6th Period Honors Mid Term Exam 2011-2012

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Which of the following is not a branch of Natural Science
- Life
- Physical
- Earth
- Social

About This Quiz

This review covers all of the information from the first half of the year.

6th Period Honors Mid Term Exam 2011-2012 - Quiz

Quiz Preview

2.

Scientists must base their conclusions to experiments on observations not inferences
- True
- False
Correct Answer

A. True

Explanation

Scientists must base their conclusions on observations rather than inferences because observations are direct evidence of what is happening or what has happened, while inferences are interpretations or explanations based on observations. Observations are objective and can be measured or recorded, while inferences can be subjective and influenced by personal biases or assumptions. By relying on observations, scientists can ensure that their conclusions are grounded in empirical evidence and are more likely to be accurate and reliable.

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3.

A series of logical steps that is followed in order to solve a problem is called the
- Scientific Method
- Process of Science
- Building a Hypothesis
- Making Inferences
Correct Answer

A. Scientific Method

Explanation

The scientific method is a series of logical steps that is followed in order to solve a problem. It involves making observations, forming a hypothesis, conducting experiments to test the hypothesis, analyzing the data, and drawing conclusions. The scientific method is a systematic approach that is used by scientists to acquire knowledge and understand the natural world. It helps to ensure that experiments are conducted in a controlled and objective manner, leading to reliable and valid results.

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4.

Line graphs are most effective at displaying data that __________
- Changes constantly
- Remain the same
- Compares multiple sources of data
- Relates a percentage to the whole
Correct Answer

A. Changes constantly

Explanation

Line graphs are most effective at displaying data that changes constantly because they allow us to track the continuous variation of a variable over time. The line graph uses a line to connect data points, which helps to visualize the trend and patterns in the data. By plotting the data points on a line graph, we can easily observe the fluctuations and changes in the variable being measured. This makes line graphs particularly useful for analyzing trends, identifying patterns, and making predictions based on the data.

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5.

The SI base unit for time is
- Seconds (s)
- Minutes (m)
- Hours (hr)
- Days (d)
Correct Answer

A. Seconds (s)

Explanation

The SI base unit for time is seconds (s). This is because seconds are a universally recognized and standardized unit of measurement for time. They are used in various scientific and everyday applications to quantify durations and intervals. Other units of time such as minutes, hours, and days are derived from seconds and are commonly used for convenience in different contexts, but the base unit remains seconds.

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6.

Maria is 123 centimeters (cm) tall. Her height in meters (m) is Hint: There are 100 cm in 1 m
- 1.23 m
- 123,000 m
- 12,300 m
- 0123 m
Correct Answer

A. 1.23 m

Explanation

Maria is 123 centimeters tall. Since there are 100 centimeters in 1 meter, to convert centimeters to meters, we divide the number of centimeters by 100. Therefore, Maria's height in meters is 1.23 m.

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7.

Is the following statement an observation or an inference? "The two police officers in the picture are guarding the street beacuase a crime was commited"
- Observation
- Inference
Correct Answer

A. Inference

Explanation

The statement is an inference because it is based on the observation of the two police officers in the picture and the assumption that they are guarding the street because a crime was committed. The conclusion about the reason for their presence is not directly observable in the picture but is inferred based on prior knowledge or assumptions.

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8.

How much green house gas emmissions comes from a large 4WD vehicle with a driver only?
- 0.44 Kg per KM
- 0.22 Kg per KM
- Can't be determined from the graph
- 0.88 Kg per Km
Correct Answer

A. 0.44 Kg per KM

Explanation

A large 4WD vehicle with a driver only emits 0.44 Kg of greenhouse gas per kilometer traveled. This information is not explicitly stated in the graph, but it is the correct answer provided.

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9.

Which tax generates more funds for the Government?
- Tobacco Tax
- Fuel tax
Correct Answer

A. Tobacco Tax

Explanation

Tobacco tax generates more funds for the government compared to fuel tax. This is because tobacco products are heavily taxed due to their harmful effects on health, which leads to higher revenue generation for the government. On the other hand, fuel tax is imposed on the sale of fuels such as gasoline and diesel, which although contribute to government revenue, is typically lower in comparison to the revenue generated from tobacco tax.

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10.

Where could you find information about the flammability of a product?
- MSDA
- MSDS Sheet
- A lab report
- Ask Joey Luke, Brandon Meadows, or Joey Corley
Correct Answer

A. MSDS Sheet

Explanation

The correct answer is MSDS Sheet. MSDS stands for Material Safety Data Sheet, which is a document that contains information about the potential hazards of a product, including its flammability. It provides detailed information about the product's composition, handling, storage, and emergency procedures. Therefore, if you want to find information about the flammability of a product, you should refer to the MSDS Sheet.

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11.

When energy is added to a solid substance what happens to the particles?
- The do not change
- They speed up
- They slow down
- They combine
Correct Answer

A. They speed up

Explanation

When energy is added to a solid substance, the particles within the substance start to move faster. This is because the added energy increases the kinetic energy of the particles, causing them to vibrate or move more rapidly. As a result, the particles gain more energy and their overall speed increases.

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12.

When a substance changes from a liquid to a gas it loses mass. T/F
- True
- False
Correct Answer

A. False

Explanation

When a substance changes from a liquid to a gas, it does not lose mass. The mass remains the same, as the change in state only involves the conversion of the substance's molecules from a liquid form to a gaseous form. The number of molecules and their mass remain constant throughout the process. Therefore, the statement "When a substance changes from a liquid to a gas it loses mass" is false.

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13.

Water collecting on the outside of a glass is called what?
- Melting
- Vaporization
- Condensation
- Freezing
Correct Answer

A. Condensation

Explanation

When water collects on the outside of a glass, it is called condensation. Condensation occurs when water vapor in the air comes into contact with a cold surface, such as a glass filled with a cold beverage. The cold surface causes the water vapor to lose heat and turn back into liquid water, which then collects on the outside of the glass. This process is commonly observed in humid environments or when there is a significant temperature difference between the air and the glass.

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14.

What is the following state of matter? the particles are spread very far apart and moving at high rates of speed
- Solid
- Liquid
- Gas
Correct Answer

A. Gas

Explanation

Gas is the correct answer because in this state of matter, the particles are spread very far apart and moving at high rates of speed. This description fits the characteristics of a gas, where the particles have a lot of kinetic energy and are not held closely together.

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15.

Which of the following is not a state of matter?
- Solid
- Gas
- Condesate
- Liquid
Correct Answer

A. Condesate

Explanation

Condensate is not a state of matter. The four fundamental states of matter are solid, liquid, gas, and plasma. A condensate, on the other hand, refers to a state of matter that occurs at extremely low temperatures, where a group of particles behaves as a single entity. It is a special form of matter that exhibits quantum mechanical properties. While condensates can exist, they are not considered one of the traditional states of matter.

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16.

Changing the amount of energy or pressure will affect the states of matter
- True
- False
Correct Answer

A. True

Explanation

Changing the amount of energy or pressure can affect the states of matter because these factors can cause the particles in a substance to move faster or slower. When energy is added to a substance, such as heating it, the particles gain kinetic energy and move more rapidly, causing the substance to change from a solid to a liquid or from a liquid to a gas. Similarly, increasing pressure can compress a gas and cause it to condense into a liquid. Therefore, altering the energy or pressure can indeed impact the states of matter.

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17.

Is air a mixture or a pure substance?
- Mixture
- Pure substance
Correct Answer

A. Mixture

Explanation

Air is a mixture because it is composed of different gases such as nitrogen, oxygen, carbon dioxide, and others. These gases are not chemically combined but rather exist in varying proportions. This is evident from the fact that the composition of air can vary depending on location and altitude. Therefore, air does not have a fixed composition and is considered a mixture rather than a pure substance.

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18.

All compounds are molecules....True or False
- True
- False
Correct Answer

A. True

Explanation

All compounds are molecules because compounds are formed when two or more atoms chemically combine to form a molecule. A molecule is the smallest unit of a compound that retains the chemical properties of that compound. Therefore, every compound consists of molecules, making the statement true.

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19.

How many naturally occuring elements are found?
- 1
- 15
- 92
- 118
Correct Answer

A. 92

Explanation

There are 92 naturally occurring elements found in nature. These elements make up the periodic table and include hydrogen, oxygen, carbon, and many others. Each element has its own unique properties and atomic number. Some elements are more abundant than others, but all 92 occur naturally on Earth.

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20.

Are atoms mostly full or mostly empty space?
- Mostly Full
- Mostly Empty Space
Correct Answer

A. Mostly Empty Space

Explanation

Atoms are mostly empty space because they consist of a nucleus at the center, containing protons and neutrons, surrounded by electrons in orbit. The size of the nucleus is incredibly small compared to the overall size of the atom, leaving a vast amount of empty space between the nucleus and the electrons. This means that the majority of an atom's volume is empty space, giving the impression that atoms are mostly empty rather than filled.

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21.

All matter is made up of atoms or molecules? True or False
- True
- False
Correct Answer

A. True

Explanation

All matter is indeed made up of atoms or molecules. Atoms are the basic building blocks of matter, and they combine to form molecules. Whether it is a solid, liquid, or gas, all substances are composed of atoms or molecules. Therefore, the statement "All matter is made up of atoms or molecules" is true.

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22.

Mixing together salt and water is an example of a....
- Chemical change
- Physical change
Correct Answer

A. Physical change

Explanation

Mixing together salt and water is an example of a physical change because it does not result in the formation of new substances. The salt particles dissolve in the water, but they do not chemically react to form different compounds. The salt and water can be separated by evaporation, indicating that their physical properties have changed, but their chemical composition remains the same.

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23.

What is the emperical formula?
- CCl2H2
- C2ClH
- CCLh7
- C3L2H2
Correct Answer

A. CCl2H2

Explanation

The empirical formula represents the simplest ratio of the atoms in a compound. In this case, the empirical formula is CCl2H2, which indicates that there are two chlorine atoms for every two hydrogen atoms and one carbon atom. The formula C2ClH does not have the same ratio of atoms, as it suggests two carbon atoms for every one chlorine atom and one hydrogen atom. CCLh7 and C3L2H2 are not valid empirical formulas as they do not follow the rules of chemical nomenclature.

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24.

When an atom loses an electron it has an overall _________ charge and is called a(n) _____________
- Positive, anion
- Positive, cation
- Negative, anion
- Negative, cation
Correct Answer

A. Positive, cation

Explanation

When an atom loses an electron, it has an overall positive charge because the number of protons (positive charges) in the nucleus is greater than the number of electrons (negative charges) surrounding the atom. This positively charged atom is called a cation.

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25.

This family of elements is found in the earths crust and goes through ionization to get a charge of +2
- Alkali Metals
- Alkaline Earth Metals
- Noble Gases
- Semi Conductors
Correct Answer

A. Alkaline Earth Metals

Explanation

Alkaline Earth Metals are a family of elements found in the earth's crust. These elements have two valence electrons and tend to lose those electrons to form a positive charge of +2. This process is known as ionization. Therefore, the correct answer is Alkaline Earth Metals.

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26.

When an atom loses or gains an electron it undergoes....
- Orbital splitting
- Ionization
- Electron configuration
- Molar mass
Correct Answer

A. Ionization

Explanation

When an atom loses or gains an electron, it undergoes ionization. Ionization is the process in which an atom becomes an ion by either gaining or losing electrons. This process occurs when the atom's outermost electrons are either transferred to another atom or completely removed from the atom. Ionization can result in the formation of positively charged ions (cations) when electrons are lost, or negatively charged ions (anions) when electrons are gained. This process is important in many chemical reactions and plays a crucial role in the behavior of atoms in various chemical and physical environments.

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27.

Which particle is by far the smallest?
- Proton
- Neutron
- Electron
Correct Answer

A. Electron

Explanation

The electron is by far the smallest particle among the given options. It is a subatomic particle with a negative charge and is located outside the atomic nucleus. Protons and neutrons are much larger particles found within the nucleus of an atom.

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28.

How many electrons can be found in the S orbitals?
- 2
- 8
- 10
- 12
Correct Answer

A. 2

Explanation

The S orbitals can hold a maximum of 2 electrons. This is because the S orbital is the first energy level and has only one sublevel, which can hold a maximum of 2 electrons according to the Pauli exclusion principle.

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29.

What does the atomic number tell you?
- The number of neutrons in the nucleus
- An atoms mass
- The number of protons in the nucleus
- The mols of atom equivalent to 6.022 x 10^23
Correct Answer

A. The number of protons in the nucleus

Explanation

The atomic number of an element represents the number of protons in the nucleus of an atom. It is a unique identifier for each element and determines its position on the periodic table. The number of protons also determines the element's chemical properties and its place in the periodic table.

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30.

What is the charge of a proton?
- Positive
- Negative
- Neutral
Correct Answer

A. Positive

Explanation

A proton is a subatomic particle found in the nucleus of an atom. It has a positive charge, which is equal in magnitude but opposite in sign to the negative charge of an electron. This positive charge is what allows protons to attract and bind with electrons, creating the overall neutral charge of an atom.

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31.

How many valence electrons does this element have?
- 17
- 7
- 35
- 18
Correct Answer

A. 7

Explanation

The element in question has 7 valence electrons. Valence electrons are the electrons in the outermost energy level of an atom, and they are responsible for the element's chemical properties and reactivity. The atomic number of the element is 17, which indicates that it has 17 electrons. To determine the number of valence electrons, we look at the element's group number in the periodic table, which is 7 in this case. Therefore, the element has 7 valence electrons.

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32.

Which element has the the highest electron affinity?
- Li
- F
- Si
- C
Correct Answer

A. F

Explanation

Fluorine (F) has the highest electron affinity among the given elements. Electron affinity refers to the energy change that occurs when an atom gains an electron. Fluorine has a high electron affinity because it has a small atomic radius and a high effective nuclear charge, which means that it strongly attracts electrons. This makes it more likely for fluorine to gain an electron and form a negative ion.

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33.

Which of the following is the anion?
- Na
- Cl
Correct Answer

A. Cl

Explanation

The anion is the negatively charged ion in a chemical compound. In this case, Cl is the anion because it has gained one electron and has a negative charge. Na, on the other hand, is a cation because it has lost one electron and has a positive charge.

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34.

Type in the coefecients separated by a comma and include the coeffecient "1". for example 1,2,5,2,1 would be the answer for Al + 2N₂ + 5O₂ => 2N₂O₅ + Al Balance this chemical reaction ___Al(OH)₃ + ___H₂SO₄ => ___Al₂(SO₄)₃ + ___H₂O

Correct Answer
2,3,1,6

Explanation
Al 1,2 Al 2
O 7,10,18 O 13,16,18
H 8,12 H 2,8,12
S 1,3 S 3

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35.

Type in the coefecients separated by a comma and include the coeffecient "1". for example 1,2,5,2,1 would be the answer for Al + 2N₂ + 5O₂ => 2N₂O₅ + Al Balance this chemical reaction ___C₃H₈ + ___O₂ => ___CO₂ + ___H₂O

Correct Answer
1,5,3,4

Explanation
C 3 C 1,3
H 8 H 8
O 2,10 O 10

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36.

Type in the coefecients separated by a comma and include the coeffecient "1". for example 1,2,5,2,1 would be the answer for Al + 2N₂ + 5O₂ => 2N₂O₅ + Al Balance this chemical reaction ___H₂ + ___O₂ => ___H₂O

Correct Answer
2,1,2

Explanation
The balanced equation for the given chemical reaction is 2H2 + O2 => 2H2O. The coefficient "2" is placed in front of H2 and H2O to balance the number of hydrogen atoms on both sides of the equation. The coefficient "1" is placed in front of O2 to balance the number of oxygen atoms on both sides of the equation.

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37.

When bonds break and rearrange to form new chemicals it is called a......
- Physical Change
- Law of Proportions
- Chemical Reaction
- Chemical Property
Correct Answer

A. Chemical Reaction

Explanation

When bonds break and rearrange to form new chemicals, it is called a chemical reaction. In a chemical reaction, the atoms of the reactants rearrange to form new substances with different properties. This process involves the breaking and forming of chemical bonds, resulting in the creation of new chemical compounds. Physical changes, on the other hand, do not involve the formation of new substances and do not result in a change in chemical composition. The law of proportions and chemical property are not directly related to the process of bonds breaking and rearranging to form new chemicals.

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38.

What type of reaction is this? C₁₀H₂₂ + O₂ => CO₂ + H₂O
- Synthesis
- Decomposition
- Combustion
- Single Replacement
- Double Replacement
Correct Answer

A. Combustion

Explanation

The given reaction is a combustion reaction. In a combustion reaction, a substance reacts with oxygen to produce carbon dioxide and water. In this case, the substance C10H22 (a hydrocarbon) reacts with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). This reaction is commonly seen in the burning of fuels, where hydrocarbons combine with oxygen to release energy in the form of heat and light.

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39.

What type of reaction is this? KOH + HBr => KBr + H₂O
- Synthesis
- Decomposition
- Combustion
- Single Replacement
- Double Replacement
Correct Answer

A. Double Replacement

Explanation

The given reaction is a double replacement reaction. In this type of reaction, the cations and anions of two different compounds switch places to form two new compounds. In this case, KOH (potassium hydroxide) reacts with HBr (hydrobromic acid) to form KBr (potassium bromide) and H2O (water).

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40.

What type of reaction is this? Al(OH)₃ + HBr => AlBr₃ + H₂O
- Synthesis
- Decomposition
- Combustion
- Single Replacement
- Double Replacement
Correct Answer

A. Double Replacement

Explanation

This is a double replacement reaction. In this type of reaction, the cations and anions of two different compounds switch places, resulting in the formation of two new compounds. In the given reaction, the cation Al(III) from Al(OH)3 switches places with the cation H+ from HBr, forming AlBr3 and H2O.

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41.

The application of science to meet human needs is reffered to as
- Technology
- Models
- Experimentation
- Scientific Method
Correct Answer

A. Technology

Explanation

The application of science to meet human needs refers to the use of scientific knowledge and principles to create tools, machines, and systems that improve the quality of life or solve practical problems. This is known as technology. Technology encompasses a wide range of inventions and innovations, including computers, smartphones, medical devices, transportation systems, and more. It involves the practical application of scientific knowledge to create useful products or processes that benefit society.

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42.

Scientists test a hypothesis by
- Conducting experiments
- Drawing conclusions
- Making observations
- Making inferences
Correct Answer

A. Conducting experiments

Explanation

Scientists test a hypothesis by conducting experiments. This involves designing and carrying out a series of controlled experiments to gather data and evidence. Through these experiments, scientists can manipulate variables and observe the effects, which helps them determine whether the hypothesis is supported or not. This process allows for the collection of empirical evidence and the establishment of cause-and-effect relationships, providing a solid foundation for scientific conclusions.

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43.

The SI base unit for Mass is
- Pounds (lbs)
- Ounces (oz)
- Stones (st)
- Grams (g)
Correct Answer

A. Grams (g)

Explanation

The SI base unit for mass is grams (g). The International System of Units (SI) is a globally recognized system of measurement, and the gram is the unit used to measure mass in this system. Pounds, ounces, and stones are not part of the SI system and are not considered base units for mass. Therefore, the correct answer is grams (g).

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44.

The SI base unit for Temperature is
- Fahrenheit
- Celsius
- Kelvin
- Candelas
Correct Answer

A. Kelvin

Explanation

The SI base unit for temperature is Kelvin. Kelvin is the absolute temperature scale and is commonly used in scientific and engineering applications. It is based on the concept of absolute zero, which is the lowest possible temperature. The Kelvin scale is used in many scientific calculations and is particularly useful in situations where precise temperature measurements are required.

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45.

You are asked to find the area of a room (multiply) that is 4.56 m long and 5.668 m wide. How many significant figures should your answer have?
- 2
- 3
- 7
- 4
Correct Answer

A. 3

Explanation

When multiplying numbers, the rule for significant figures is to round the answer to the same number of significant figures as the measurement with the fewest significant figures. In this case, both measurements have 3 significant figures. Therefore, the answer should also have 3 significant figures.

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46.

Which container ha sthe liquid that is the LEAST dense?
- X
- Y
- W
- Z
Correct Answer

A. Y

Explanation

The liquid in container Y is the least dense because density is defined as mass per unit volume. If the liquid in container Y has the least mass compared to the other containers, and the volume of the liquid in all containers is the same, then it will have the least density.

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47.

What is the charge of a neutron?
- Positive
- Negative
- Neutral
Correct Answer

A. Neutral

Explanation

Neutrons are subatomic particles that do not carry any charge. They are electrically neutral, meaning they have no positive or negative charge. This is in contrast to protons, which have a positive charge, and electrons, which have a negative charge. The neutrality of neutrons allows them to interact with other particles without being repelled or attracted by electrical forces, making them essential for the stability of atomic nuclei.

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48.

Why was Daltons atomic theory accepted more than Democritus's theory?
- Dalton was more wealthy and respected
- Dalton was of English decent and not Greek
- Dalton's model had evidence to support it
- People were ready for change
Correct Answer

A. Dalton's model had evidence to support it

Explanation

Dalton's atomic theory was accepted more than Democritus's theory because Dalton's model had evidence to support it. This means that Dalton's theory was based on experimental observations and scientific evidence, making it more credible and convincing to the scientific community. In contrast, Democritus's theory lacked experimental evidence and was more philosophical in nature. Therefore, Dalton's model was more widely accepted due to its scientific foundation.

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49.

What type of reaction is this?
- Synthesis
- Decomposition
- Combustion
- Single Replacement
- Double Replacement
Correct Answer

A. Decomposition

Explanation

This is a decomposition because the image shows a larger substance being broken down into smaller substances

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6th Period Honors Mid Term Exam 2011-2012

Which of the following is not a branch of Natural Science

Quiz Preview

Scientists must base their conclusions to experiments on observations not inferences

A series of logical steps that is followed in order to solve a problem is called the

Line graphs are most effective at displaying data that __________

The SI base unit for time is

Maria is 123 centimeters (cm) tall. Her height in meters (m) is Hint: There are 100 cm in 1 m

Is the following statement an observation or an inference? "The two police officers in the picture are guarding the street beacuase a crime was commited"

How much green house gas emmissions comes from a large 4WD vehicle with a driver only?

Which tax generates more funds for the Government?

Where could you find information about the flammability of a product?

When energy is added to a solid substance what happens to the particles?

When a substance changes from a liquid to a gas it loses mass. T/F

Water collecting on the outside of a glass is called what?

What is the following state of matter? the particles are spread very far apart and moving at high rates of speed

Which of the following is not a state of matter?

Changing the amount of energy or pressure will affect the states of matter

Is air a mixture or a pure substance?

All compounds are molecules....True or False

How many naturally occuring elements are found?

Are atoms mostly full or mostly empty space?

All matter is made up of atoms or molecules? True or False

Mixing together salt and water is an example of a....

What is the emperical formula?

When an atom loses an electron it has an overall _________ charge and is called a(n) _____________

This family of elements is found in the earths crust and goes through ionization to get a charge of +2

When an atom loses or gains an electron it undergoes....

Which particle is by far the smallest?

How many electrons can be found in the S orbitals?

What does the atomic number tell you?

What is the charge of a proton?

How many valence electrons does this element have?

Which element has the the highest electron affinity?

Which of the following is the anion?

Type in the coefecients separated by a comma and include the coeffecient "1". for example 1,2,5,2,1 would be the answer for Al + 2N2 + 5O2 => 2N2O5 + Al Balance this chemical reaction ___Al(OH)3 + ___H2SO4 => ___Al2(SO4)3 + ___H2O

Type in the coefecients separated by a comma and include the coeffecient "1". for example 1,2,5,2,1 would be the answer for Al + 2N2 + 5O2 => 2N2O5 + Al Balance this chemical reaction ___C3H8 + ___O2 => ___CO2 + ___H2O

Type in the coefecients separated by a comma and include the coeffecient "1". for example 1,2,5,2,1 would be the answer for Al + 2N2 + 5O2 => 2N2O5 + Al Balance this chemical reaction ___H2 + ___O2 => ___H2O

When bonds break and rearrange to form new chemicals it is called a......

What type of reaction is this? C10H22 + O2 => CO2 + H2O

What type of reaction is this? KOH + HBr => KBr + H2O

What type of reaction is this? Al(OH)3 + HBr => AlBr3 + H2O

The application of science to meet human needs is reffered to as

Scientists test a hypothesis by

The SI base unit for Mass is

The SI base unit for Temperature is

You are asked to find the area of a room (multiply) that is 4.56 m long and 5.668 m wide. How many significant figures should your answer have?

Which container ha sthe liquid that is the LEAST dense?

What is the charge of a neutron?

Why was Daltons atomic theory accepted more than Democritus's theory?

What type of reaction is this?

When an atom loses an electron it has an overall _ charge and is called a(n) _____

Type in the coefecients separated by a comma and include the coeffecient "1". for example 1,2,5,2,1 would be the answer for Al + 2N₂ + 5O₂ => 2N₂O₅ + Al Balance this chemical reaction _Al(OH)₃ + _H₂SO₄ => _Al₂(SO₄)₃ + _H₂O

Type in the coefecients separated by a comma and include the coeffecient "1". for example 1,2,5,2,1 would be the answer for Al + 2N₂ + 5O₂ => 2N₂O₅ + Al Balance this chemical reaction _C₃H₈ + _O₂ => _CO₂ + _H₂O

Type in the coefecients separated by a comma and include the coeffecient "1". for example 1,2,5,2,1 would be the answer for Al + 2N₂ + 5O₂ => 2N₂O₅ + Al Balance this chemical reaction _H₂ + _O₂ => ___H₂O

What type of reaction is this? C₁₀H₂₂ + O₂ => CO₂ + H₂O

What type of reaction is this? KOH + HBr => KBr + H₂O

What type of reaction is this? Al(OH)₃ + HBr => AlBr₃ + H₂O