Environmental Chemistry Unit Test
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A potato will decay faster in ________ (warmer or colder) soil during the decomposition process.
About This Quiz
This test will go over the Grade 9 Environment Chemistry Unit with topics such as:
the Nitrogen Cycle Nitrogen Fixation Cellular Respiration Acid & Base Neutralization Macronutrients & Micronutrients Organic and Inorganic Compounds Diffusion Osmosis Active Transport Hydrolysis Subtrates Water Quality PPM (parts per million) *you will need a calculator Biological & Chemical Indicators LD50 Heavy Metals Air Quality Air Pollution (ie. Greenhouse Gases, Global Warming) Harmful Substances Biomagnification WHMIS MSDS Storage and Disposing of Hazardous MaterialGood Luck :)
(296).jpg "Environmental Chemistry Unit Test - Quiz")
Quiz Preview
- 2.
Macronutrients mean that nutrients are needed in large amounts.
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True
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False
Correct Answer
A. TrueExplanation
Macronutrients refer to the essential nutrients that are required by the body in large quantities for proper functioning. These include carbohydrates, proteins, and fats. These nutrients provide the body with energy, support growth and development, and help maintain overall health. Therefore, it is correct to say that macronutrients are needed in large amounts.Rate this question:
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- 3.
____________ are used to kill or control weeds form growing.
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Herbicides
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Weed Poison
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Hydrolysis
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Photosynthesis
Correct Answer
A. HerbicidesExplanation
Herbicides are chemicals that are used to kill or control weeds from growing. They are specifically designed to target and eliminate unwanted plants, while minimizing damage to desirable plants. Herbicides work by interfering with the growth and development of weeds, either by inhibiting essential enzymes or disrupting their metabolic processes. This ultimately leads to the death or suppression of weeds, allowing for the healthy growth of desired plants.Rate this question:
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- 4.
Acid rain causes the water to become __________.
Correct Answer
acidic, AcidicExplanation
Acid rain is a type of pollution that occurs when pollutants in the air, such as sulfur dioxide and nitrogen oxide, react with water vapor and other chemicals in the atmosphere. This reaction forms acidic compounds, such as sulfuric acid and nitric acid, which then fall to the ground as rain. As a result, the water becomes acidic, meaning it has a low pH level. This can have harmful effects on aquatic life, plants, and even buildings and infrastructure.Rate this question:
- 5.
Micronutrients means that nutrients are needed in __________ amounts.
Correct Answer
small, Small, smaller, SmallerExplanation
Micronutrients refers to essential nutrients that are required by the body in small amounts. These nutrients include vitamins and minerals, which play crucial roles in various bodily functions and overall health. While macronutrients like carbohydrates, proteins, and fats are needed in larger quantities, micronutrients are only needed in small amounts for optimal functioning of the body. Therefore, the correct answer is "small, Small, smaller, Smaller".Rate this question:
- 6.
A bag of garden fertilizer has the laberl 5-18-10. These 3 numbers on a fertilizer label represent the percent composition of:
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Nitrogen, phosphorus, and potassium
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Nitrogen, sodium, and potassium
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Carbon, phosphorus, and hydrogen
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Carbon, oxygen and hydrogen
Correct Answer
A. Nitrogen, phosphorus, and potassiumExplanation
The numbers on a fertilizer label represent the percent composition of nitrogen, phosphorus, and potassium. In this case, the label 5-18-10 indicates that the fertilizer contains 5% nitrogen, 18% phosphorus, and 10% potassium. These three nutrients are essential for plant growth and are commonly found in fertilizers to provide the necessary elements for healthy plant development.Rate this question:
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- 7.
Vinegar has a pH reading of 2.2 and is considered a________.
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Strong base
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Strong acid
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Weak base
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Weak acid
Correct Answer
A. Strong acidExplanation
Vinegar has a pH reading of 2.2, which is significantly below 7 (the neutral pH). This indicates that vinegar is highly acidic. Therefore, the correct answer is "strong acid."Rate this question:
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- 8.
Which of these transport mechanisms requires energy?
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Active Transport
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Osmosis
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Diffusion
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Gas
Correct Answer
A. Active TransportExplanation
Active transport is the only transport mechanism among the options that requires energy. Active transport moves molecules or ions against their concentration gradient, from an area of lower concentration to an area of higher concentration, which requires the input of energy. Osmosis, diffusion, and gas transport all occur naturally without the need for energy input.Rate this question:
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- 9.
Some fertilizers have a fourth number and the letter "S" on the label indicating that they contain _________.
Correct Answer
Sulfur, surlfurExplanation
The fourth number and the letter "S" on the label of some fertilizers indicate that they contain sulfur. Sulfur is an essential nutrient for plants, as it plays a crucial role in protein synthesis, enzyme activity, and chlorophyll formation. It is particularly important for crops like onions, garlic, and cruciferous vegetables. Sulfur deficiency can lead to stunted growth and reduced crop yield. Therefore, the presence of sulfur in fertilizers helps to ensure that plants receive an adequate supply of this essential nutrient.Rate this question:
- 10.
In diffusion, molecules move form an area of _________concentration to and area of _________ concentration.
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Low to High
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High to Low
Correct Answer
A. High to LowExplanation
In diffusion, molecules naturally move from an area of higher concentration to an area of lower concentration. This is because molecules tend to spread out and become evenly distributed. Therefore, the correct answer is "High to Low".Rate this question:
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- 11.
In a Sewage Treatment Plant, the final place effluent goes to is the ________.
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River
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Garbage
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Drinking water
Correct Answer
A. RiverExplanation
In a Sewage Treatment Plant, the final place where the effluent goes to is the river. After undergoing various treatment processes, the sewage is discharged into the river. This is done to ensure that the treated effluent is diluted and dispersed in a large water body, minimizing its impact on the environment. Discharging into a river also allows for further natural purification processes to take place as the water flows downstream.Rate this question:
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- 12.
In an Active Transport, molecules move from an area of _________ concentration to an are of ________ concentration.
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High to Low
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Low to High
Correct Answer
A. Low to HighExplanation
Active transport is a process that requires energy to move molecules against their concentration gradient, from an area of lower concentration to an area of higher concentration. This is in contrast to passive transport, where molecules move down their concentration gradient from an area of higher concentration to an area of lower concentration. Therefore, in active transport, molecules move from an area of low concentration to an area of high concentration.Rate this question:
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- 13.
Since temperature affects oxygen concentration, when the temperature of water is low then the ______ (more or less) oxygen it can hold.
Correct Answer
more, MoreExplanation
When the temperature of water is low, it can hold more oxygen. This is because colder water molecules are closer together, allowing for more oxygen molecules to dissolve in the water. As the temperature increases, the water molecules move further apart, reducing the amount of oxygen that can be dissolved. Therefore, the correct answer is that when the temperature is low, water can hold more oxygen.Rate this question:
- 14.
Carbohydrates, Lipids, Proteins or Amino Acids, and Nucleic Acids all contain ___________.
Correct Answer
carbon, Carbon, C, cExplanation
Carbohydrates, lipids, proteins, amino acids, and nucleic acids all contain carbon. Carbon is a fundamental element present in the structure of these biomolecules, forming the backbone or functional groups. It plays a crucial role in the formation of chemical bonds and contributes to the diversity and complexity of these macromolecules.Rate this question:
- 15.
What are the 3 major contaminants in the air?
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Sulfur Dioxide
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Nitrogen Oxides
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Oxygen
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Phosphorus
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Carbon Monoxide
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Helium
Correct Answer(s)
A. Sulfur Dioxide
A. Nitrogen Oxides
A. Carbon MonoxideExplanation
The three major contaminants in the air are sulfur dioxide, nitrogen oxides, and carbon monoxide. Sulfur dioxide is released into the air through industrial processes and burning fossil fuels, causing respiratory problems and contributing to acid rain. Nitrogen oxides are primarily produced by vehicle emissions and industrial activities, leading to smog formation and respiratory issues. Carbon monoxide is a colorless and odorless gas released by the incomplete combustion of fossil fuels, posing a serious health risk as it reduces the blood's ability to carry oxygen. These contaminants have significant impacts on air quality and human health.Rate this question:
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- 16.
___________ are used to remove sulfur dioxide emissions.
Correct Answer(s)
scrubbers, ScrubbersExplanation
Scrubbers, also known as scrubbers, are used to remove sulfur dioxide emissions.Rate this question:
- 17.
What does LD50 stand for?
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Lethal dose, killing 50% of population
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Legal dose, killing 50% of population
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Legal dose, with 50% of drugs
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Lethal dose, with 50% drugs
Correct Answer
A. Lethal dose, killing 50% of populationExplanation
LD50 stands for Lethal dose, killing 50% of population. It is a measure used in toxicology to determine the lethal dose of a substance that would kill 50% of the test population. This measure helps in assessing the toxicity of a substance and determining its potential harm to living organisms.Rate this question:
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- 18.
What are the most common elements in living things?
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Zinc,Hydrogen,Potassium,Calcium
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Carbohydrates, Lipids, Proteins, Nucleic Acids
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Fat, Muscles, Organs, Bones
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Calcium, Lithium, Potassium, Nitrogen
Correct Answer
A. Carbohydrates, Lipids, Proteins, Nucleic AcidsExplanation
Carbohydrates, lipids, proteins, and nucleic acids are the most common elements in living things. These biomolecules are essential for the structure, function, and regulation of cells. Carbohydrates are a major source of energy, lipids are important for energy storage and insulation, proteins are involved in various biological processes, and nucleic acids carry genetic information. Together, these biomolecules play crucial roles in the growth, development, and maintenance of living organisms.Rate this question:
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- 19.
Which of these are examples of Nucleic Acids?
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RNA
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Gas
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DNA
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Lemon Juice
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Household cleaning products
Correct Answer(s)
A. RNA
A. DNAExplanation
RNA and DNA are examples of nucleic acids. Nucleic acids are macromolecules that store and transmit genetic information in living organisms. RNA (ribonucleic acid) is involved in protein synthesis and gene expression, while DNA (deoxyribonucleic acid) carries the genetic instructions for the development and functioning of all known living organisms. Gas, lemon juice, and household cleaning products are not examples of nucleic acids as they do not possess the molecular structure or function of nucleic acids.Rate this question:
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- 20.
Purified wastewater that is released into rivers or lakes is known as:
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Sewage
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Effluent
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Septic sludge
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Storm runoff
Correct Answer
A. EffluentExplanation
Effluent refers to the purified wastewater that is released into rivers or lakes. It is the final product of the treatment process, where impurities and contaminants are removed from the wastewater to make it safe for discharge into the environment. This term is commonly used in the context of wastewater treatment plants, where the treated water is referred to as effluent before it is released into natural bodies of water.Rate this question:
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- 21.
In Osmosis, molecules of _________ move from an area of ________ concentration to an area of ________ concentration.
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Air, high to low
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Air, low to high
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Water, high to low
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Water, low to high
Correct Answer
A. Water, high to lowExplanation
In osmosis, molecules of water move from an area of high concentration to an area of low concentration. This is because osmosis is the movement of solvent molecules (in this case, water) across a semi-permeable membrane from an area of higher concentration to an area of lower concentration.Rate this question:
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- 22.
Which of these are examples of Carbohydrates?
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Meat
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Pasta
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Rice
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Fats
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Dairy Products
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Bread
Correct Answer(s)
A. Pasta
A. Rice
A. BreadExplanation
Pasta, rice, and bread are examples of carbohydrates because they are all made primarily of starch, which is a complex carbohydrate. Carbohydrates are one of the three main macronutrients and are a major source of energy for the body. They are found in foods such as grains, fruits, vegetables, and legumes. Meat, fats, and dairy products, on the other hand, are not carbohydrates, as they primarily contain protein or fat.Rate this question:
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- 23.
What are the 3 products of fuel combustion? Hyrdrocarbon + Oxygen= ________+_________+________
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CO2+H20+energy
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02+CO2+H20
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CH4+202+CO2
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S+NOx+energy
Correct Answer
A. CO2+H20+energyExplanation
The correct answer is CO2+H20+energy. When fuel combustion occurs, hydrocarbon and oxygen react to form carbon dioxide (CO2), water (H2O), and release energy. This is a common process in the combustion of fossil fuels and other organic materials.Rate this question:
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- 24.
In Biomagnification, if it were to take place on a farm, the primary consumer of the pest infected wheat would be the __________.
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Rooster
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Mice
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Chicken
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Weasel
Correct Answer
A. MiceExplanation
In Biomagnification, the process of toxins accumulating in higher levels of a food chain, the primary consumer of the pest-infected wheat on a farm would be mice. This is because mice are commonly found in agricultural areas and are known to feed on grains and crops. As the primary consumer, they would be the first to ingest the pesticides or toxins present in the wheat, which can then bioaccumulate and have harmful effects on the mice and potentially on the organisms that consume them.Rate this question:
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- 25.
What are the 3 ways that chemicals or nutrients move in living things?
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Roots
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Photosynthesis
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Osmosis
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Hydrolysis
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Diffusion
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Active Transport
Correct Answer(s)
A. Osmosis
A. Diffusion
A. Active TransportExplanation
Chemicals or nutrients move in living things through three main ways: osmosis, diffusion, and active transport. Osmosis is the movement of water molecules across a semipermeable membrane from an area of low solute concentration to an area of high solute concentration. Diffusion is the movement of molecules from an area of high concentration to an area of low concentration. Active transport, on the other hand, requires energy and is the movement of molecules against their concentration gradient, from an area of low concentration to an area of high concentration. These three processes play vital roles in maintaining the balance and functioning of living organisms.Rate this question:
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- 26.
Acid rain is produced when we burn fossil fuels, it then releases ____________ and _________ into the atmosphere.
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SO2 and NOx
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SO2 and O2
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Nox and CO2
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CO2 and O2
Correct Answer
A. SO2 and NOxExplanation
When fossil fuels are burned, they release sulfur dioxide (SO2) and nitrogen oxides (NOx) into the atmosphere. These gases combine with water vapor in the air to form sulfuric acid and nitric acid, which then fall to the ground as acid rain.Rate this question:
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- 27.
Sunflowers were used at Chernobyl to help reduce radioactive substances from groundwater. Which method of reducing pollutants is this?
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Hyrdolysis
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Biodegration
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Photolysis
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Phytormediation
Correct Answer
A. PhytormediationExplanation
Phytoremediation is the process of using plants to remove, degrade, or immobilize pollutants from soil, water, or air. In this case, sunflowers were used at Chernobyl to help reduce radioactive substances from groundwater. Sunflowers have the ability to absorb and accumulate heavy metals and radioactive contaminants from the soil through their roots. The contaminants are then stored in the plant's tissues or broken down by the plant's natural processes. Therefore, the use of sunflowers in this context is an example of phytoremediation.Rate this question:
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- 28.
Compounds that do not contain carbon are called ___________.
Correct Answer
inorganic compounds, Inorganic CompoundsExplanation
Compounds that do not contain carbon are referred to as inorganic compounds. These compounds can include minerals, metals, and nonmetals, among others. Inorganic compounds are typically simpler in structure compared to organic compounds, which contain carbon. They play essential roles in various chemical processes and are found in many natural and synthetic materials. The term "inorganic compounds" can be written in lowercase or capitalized, as both are acceptable.Rate this question:
- 29.
In the Tertiary Treatment, the effluent (treated wastewater) goes to the __________________ process for further treatment.
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Sanitation Center
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Ultra violet sun
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UV Disinfection
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Reproduction center
Correct Answer
A. UV DisinfectionExplanation
In the Tertiary Treatment, the effluent (treated wastewater) goes to the UV Disinfection process for further treatment. UV disinfection is a method that uses ultraviolet light to kill or inactivate microorganisms in the water. This process helps to remove any remaining bacteria, viruses, and parasites that may still be present in the treated wastewater, ensuring that it is safe for discharge or reuse.Rate this question:
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- 30.
Carbohydrates, Lipids, Proteins, Nucleic Acids are also known as __________________
Correct Answer
Organic Compounds, organic compoundsExplanation
Carbohydrates, lipids, proteins, and nucleic acids are all types of organic compounds. Organic compounds are molecules that contain carbon atoms bonded with other elements such as hydrogen, oxygen, nitrogen, and phosphorus. These compounds are essential for the structure and function of living organisms. Carbohydrates provide energy, lipids are important for storing energy and forming cell membranes, proteins are involved in various cellular processes, and nucleic acids carry genetic information. Therefore, it is correct to refer to carbohydrates, lipids, proteins, and nucleic acids as organic compounds.Rate this question:
- 31.
Which of these are examples of Lipids?
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Potatoes
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Meat
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Vegetables
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Fats
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Oil
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Waxes
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Glucose
Correct Answer(s)
A. Fats
A. Oil
A. WaxesExplanation
Fats, oil, and waxes are examples of lipids because they are all hydrophobic molecules that are insoluble in water. Lipids are an essential component of living organisms and serve various functions such as energy storage, insulation, and protection. Potatoes, meat, vegetables, and glucose are not lipids as they do not possess the characteristic properties of lipids.Rate this question:
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- 32.
Natural gas that contains __________ ___________ is called "sour" gas.
Correct Answer(s)
hydrogen sulfide, Hydrogen SulfideExplanation
Natural gas that contains hydrogen sulfide is called "sour" gas. Hydrogen sulfide is a colorless gas that has a strong odor of rotten eggs. It is highly toxic and flammable, and can cause various health problems if inhaled. When present in natural gas, it gives the gas a sour taste and smell. Therefore, natural gas containing hydrogen sulfide is referred to as "sour" gas.Rate this question:
- 33.
In a Sewage Treatment Plant, the second place sewage goes to is ____________.
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Primary Treatment
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Secondary Treatment
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Tertiary Treatment
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Headworks
Correct Answer
A. Primary TreatmentExplanation
In a Sewage Treatment Plant, the second place sewage goes to is the Primary Treatment. This is the initial stage of treatment where physical processes like screening, sedimentation, and filtration are used to remove large solids, grit, and debris from the sewage. The primary treatment helps in reducing the organic content and suspended solids in the wastewater before it moves on to the next stage of treatment.Rate this question:
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- 34.
The fifth place sewage goes to in a Sewage Treatment Plant, is in the ________________.
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River
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Tertiary Treatment
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Fifth Treatment
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Secondary Treatment
Correct Answer
A. Tertiary TreatmentExplanation
In a Sewage Treatment Plant, the sewage goes through several stages of treatment to remove impurities and contaminants. The fifth place where the sewage goes is the Tertiary Treatment. Tertiary treatment is the final stage of treatment where advanced methods are used to further remove any remaining solids, organic matter, and harmful substances from the wastewater. This stage ensures that the treated water is of high quality and can be safely discharged into the environment or reused for various purposes.Rate this question:
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- 35.
Which of these are examples of Proteins (Amino Acids)?
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Eggs
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Fats
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Fruits
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Dairy Products
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Meat
Correct Answer(s)
A. Eggs
A. Dairy Products
A. MeatExplanation
Proteins are made up of amino acids, and examples of foods that are high in protein include eggs, dairy products, and meat. These foods contain essential amino acids that are necessary for the body's growth, repair, and maintenance. Fats and fruits, on the other hand, are not examples of proteins as they do not contain amino acids in significant amounts.Rate this question:
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- 36.
What element do bacteria remove from a PCB molecule?
Correct Answer(s)
Cl, Chlorine, chlorineExplanation
Bacteria remove chlorine (Cl) from a PCB (polychlorinated biphenyl) molecule.Rate this question:
- 37.
If the pH of the water in an aquatic environment is below ___, there will not be many fish there.
Correct Answer(s)
5.0, 5Explanation
If the pH of the water in an aquatic environment is below 5.0, there will not be many fish there. pH is a measure of the acidity or alkalinity of a solution. Fish require a specific pH range in order to survive and thrive. If the pH drops below 5.0, it indicates that the water is highly acidic, which can be harmful to fish. Therefore, if the pH is below 5.0, there will not be many fish present in the aquatic environment.Rate this question:
- 38.
As a result of the ozone layer's thinning, there will be a greater exposure to ________________ on the Earth's surface causing harmful effects on organisms.
Correct Answer(s)
uv radiation, UV Radiation, UV radiation, uv RadiationExplanation
As a result of the ozone layer's thinning, there will be a greater exposure to UV radiation on the Earth's surface causing harmful effects on organisms. UV radiation refers to the high-energy rays from the sun that can cause sunburn, skin cancer, and damage to the DNA of living organisms. With the ozone layer becoming thinner, more UV radiation can penetrate the atmosphere and reach the Earth's surface, posing a threat to the health and well-being of living organisms.Rate this question:
- 39.
What are the 5 categories of water use which Provinvial and Federal governments use to regulate water quality?
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Human drinking water
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Dissolved oxygen
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Recreations
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Acidity
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Livestock drinking water
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Pesticides
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Irrigation
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Heavy metals
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Protection of aquatic life
Correct Answer(s)
A. Human drinking water
A. Recreations
A. Livestock drinking water
A. Irrigation
A. Protection of aquatic lifeExplanation
The Provincial and Federal governments use the five categories of water use to regulate water quality, which are human drinking water, recreation, livestock drinking water, irrigation, and protection of aquatic life. These categories encompass the different ways in which water is utilized and highlight the importance of maintaining water quality in order to ensure the health and well-being of humans, animals, and the environment. By regulating these categories, the governments can establish standards and guidelines to safeguard water resources and mitigate potential risks to public health and the ecosystem.Rate this question:
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- 40.
Scrubbers use ___________ to react with the sulfur dioxide to make gypsums.
Correct Answer(s)
limestone, LimestoneExplanation
Scrubbers use limestone to react with sulfur dioxide and produce gypsum. Limestone is a common rock composed mainly of calcium carbonate. When limestone is exposed to sulfur dioxide, a chemical reaction occurs, resulting in the formation of gypsum. Gypsum is a soft mineral that can be used in various applications, such as construction materials and fertilizer. Therefore, the use of limestone in scrubbers helps to reduce sulfur dioxide emissions and mitigate the environmental impact of industrial processes.Rate this question:
- 41.
Carbon dioxide levels have been measured and analyzed. They have been rising since the Industrial Revolution. What viewpoint is this statement?
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Ecological
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Economic
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Educational
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Egocentric
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Ethical(Moral)
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Health-related
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Recreational
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Political
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Scientific
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Technological
Correct Answer
A. ScientificExplanation
The given statement about measuring and analyzing carbon dioxide levels and noting their rise since the Industrial Revolution indicates a scientific viewpoint. This viewpoint is based on the collection and analysis of empirical data to understand the phenomenon of rising carbon dioxide levels. It does not involve personal opinions or subjective beliefs, but rather relies on objective observations and scientific methods to draw conclusions.Rate this question:
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- 42.
Countries and governemnt`s around the world signed a contract to help limit sulfur dioxide and nitrogen emissions. What viewpoint is stated?
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Ecological
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Economic
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Educational
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Egocentric
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Ethical(Moral)
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Health-related
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Recreational
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Political
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Scientific
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Technological
Correct Answer
A. PoliticalExplanation
The viewpoint stated in the given question is political. This can be inferred from the fact that countries and governments signed a contract to address the issue of limiting sulfur dioxide and nitrogen emissions. This suggests that the decision and action taken are driven by political considerations and agreements between different nations and their governments.Rate this question:
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- 43.
In a Sewage Treatment Plant, the third place sewage travels to is the ____________.
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Bioreactors microbes
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Tertiary Treatment
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Third Clarifiers
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River
Correct Answer
A. Bioreactors microbesExplanation
In a Sewage Treatment Plant, after undergoing primary and secondary treatment processes, the third stage involves the use of bioreactors microbes. These microbes help to further break down and remove any remaining organic matter and pollutants from the sewage. This is an important step in the treatment process to ensure that the water is safe to be discharged back into the environment or reused for other purposes.Rate this question:
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- 44.
Microbes in a Sewage Treatment Plant settle to the bottom of the tank, where ___________ is also located.
Correct Answer
sludge, SludgeExplanation
Microbes in a sewage treatment plant settle to the bottom of the tank, where sludge is also located. Sludge refers to the solid waste material that accumulates at the bottom of the tank during the sewage treatment process. It consists of organic and inorganic matter, including the microbes that have been removed from the wastewater. This sludge needs to be further processed and treated before it can be safely disposed of or used for beneficial purposes, such as fertilizer or energy production.Rate this question:
- 45.
In a Sewage Treatment Plant, UV exposure changes the ________ structure so they can't reproduce.
Correct Answer
DNA, dnaExplanation
UV exposure can cause damage to the DNA structure, specifically by creating thymine dimers. These dimers prevent the DNA strands from separating properly during replication, leading to errors and mutations. As a result, the damaged DNA cannot effectively reproduce, inhibiting the growth and replication of the microorganisms in the sewage treatment plant.Rate this question:
- 46.
_________________ has contributed to the thinning of the ozone layer because of our use of chemicals.
Correct Answer
CFC's
cfc's
Chlorofluorocarbons
chlorofluorocarbonsExplanation
CFC's (Chlorofluorocarbons) have contributed to the thinning of the ozone layer because of our use of these chemicals.Rate this question:
- 47.
Bioreactors microbes and air eat the dissolved ____________.
Correct Answer
nutrients, NutrientsExplanation
Bioreactors are designed to support the growth of microbes, which require nutrients to survive and thrive. These nutrients are dissolved in the medium within the bioreactor. The microbes consume these dissolved nutrients as a source of energy and building blocks for their own growth and metabolism. Therefore, the correct answer is "nutrients". The capitalized "Nutrients" is likely a typographical error and should be considered the same as "nutrients" in this context.Rate this question:
- 48.
In a Sewage Treatment Plant, the first place sewage goes to is ____________
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Head works
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Primary Treatment
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Bio-reactors
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Tertiary Treatment
Correct Answer
A. Head worksExplanation
In a Sewage Treatment Plant, the first place sewage goes to is the head works. The head works is the initial stage of the treatment process where the sewage enters the plant and undergoes preliminary treatment. This includes processes such as screening to remove large objects, grit removal to separate sand and gravel, and flow measurement. The head works prepare the sewage for further treatment in the plant, making it an essential step in the overall sewage treatment process.Rate this question:
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- 49.
What 2 ways are air quality measured?
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Levels of pollutants
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Using scrubbers
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Estimating amount of emissions
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By taking samples of oxygen levels
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Using a air quality thermometer
Correct Answer(s)
A. Levels of pollutants
A. Estimating amount of emissionsExplanation
Air quality is measured by analyzing the levels of pollutants present in the air and estimating the amount of emissions released into the atmosphere. This can be done by monitoring and measuring the concentration of various pollutants such as particulate matter, carbon monoxide, sulfur dioxide, nitrogen dioxide, and ozone. Additionally, the amount of emissions can be estimated by considering factors such as industrial activities, transportation, and energy production. By assessing these factors, scientists and environmental agencies can determine the overall air quality and take necessary measures to improve it.Rate this question:
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