STD - 6th Test No.01
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Questions and Answers
- 1.
Which are the main factors important for sustaining the life on the earth?
- A.
Air
- B.
Water
- C.
Land
- D.
All above
Correct Answer
D. All aboveExplanation
The main factors important for sustaining life on Earth are air, water, and land. These three elements are essential for the survival of all living organisms. Air provides oxygen for respiration, water is necessary for hydration and various bodily functions, and land provides a habitat for organisms to live and grow. Therefore, all of the above factors are crucial for sustaining life on Earth.Rate this question:
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- 2.
How much percentage of the earth is occupied by land?
- A.
29%
- B.
71%
- C.
49%
- D.
39%
Correct Answer
A. 29%Explanation
Approximately 29% of the Earth's surface is occupied by land. This means that about one-third of the Earth's total area is made up of landmasses such as continents and islands, while the remaining percentage is covered by water bodies like oceans, seas, and lakes. This distribution of land and water on our planet is important for various ecological processes, climate patterns, and the existence of diverse habitats for life forms.Rate this question:
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- 3.
How much percentage of the earth is occupied by water?
- A.
29%
- B.
71%
- C.
39%
- D.
42%
Correct Answer
B. 71%Explanation
Approximately 71% of the Earth's surface is covered by water. This includes the oceans, seas, lakes, rivers, and other bodies of water. The Earth's water is distributed in various forms such as liquid, vapor, and ice. This vast amount of water plays a crucial role in regulating the Earth's climate, supporting diverse ecosystems, and providing a habitat for countless species.Rate this question:
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- 4.
Who fulfill our basic needs on the earth?
- A.
God
- B.
Man
- C.
Natural resources
- D.
Space
Correct Answer
C. Natural resourcesExplanation
Natural resources fulfill our basic needs on the earth. They provide us with essential things like food, water, shelter, and energy. Without natural resources, it would be impossible for humans to survive and meet their basic needs.Rate this question:
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- 5.
The living things and parts of the earth are occupy by the.........
- A.
Hydrosphere
- B.
Atmosphere
- C.
Lithosphere
- D.
All above
Correct Answer
D. All aboveExplanation
The correct answer is "All above" because living things and parts of the earth are occupied by the hydrosphere (water bodies), the atmosphere (air), and the lithosphere (land). This means that all of these components play a role in supporting and sustaining life on Earth.Rate this question:
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- 6.
Which of the following sphere occupy large part of the earth?
- A.
Hydrosphere
- B.
Lithosphere
- C.
Both a and b
- D.
None of above
Correct Answer
A. HydrosphereExplanation
The correct answer is Hydrosphere. The hydrosphere refers to all the water on Earth, including oceans, lakes, rivers, groundwater, and even water vapor in the atmosphere. It covers a large part of the Earth's surface, with approximately 71% of the planet being covered in water. The lithosphere, on the other hand, refers to the solid outer layer of the Earth, which includes the crust and upper mantle. While the lithosphere is also significant, it does not occupy as large a part of the Earth as the hydrosphere. Therefore, the correct answer is the hydrosphere.Rate this question:
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- 7.
Which sphere on the earth occupy less part than Hydrosphere?
- A.
Hydrosphere
- B.
Lithosphere
- C.
Both a and b
- D.
None of the above
Correct Answer
B. LithosphereExplanation
The lithosphere is the solid outer layer of the Earth, which includes the crust and the uppermost part of the mantle. It occupies less part than the hydrosphere, which refers to all the water on Earth, including oceans, lakes, rivers, and groundwater. Therefore, the lithosphere is the correct answer as it occupies a smaller portion of the Earth compared to the hydrosphere.Rate this question:
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- 8.
Which gases are present in the atmosphere?
- A.
Nitrogen
- B.
Oxygen
- C.
Argon
- D.
All above
Correct Answer
D. All aboveExplanation
The correct answer is "All above" because nitrogen, oxygen, and argon are all gases that are present in the atmosphere. Nitrogen makes up the majority of the atmosphere, while oxygen is essential for supporting life. Argon is a noble gas that is present in small amounts. Therefore, all three gases are indeed present in the atmosphere.Rate this question:
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- 9.
Which of the following gas occupy large part of the atmosphere?
- A.
Argon
- B.
Carbon dioxide
- C.
Nitrogen
- D.
Oxygen
Correct Answer
C. NitrogenExplanation
Nitrogen is the correct answer because it occupies the largest part of the Earth's atmosphere. It makes up about 78% of the atmosphere, followed by oxygen at around 21%. Argon and carbon dioxide are present in much smaller amounts.Rate this question:
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- 10.
Which of the following gas occupy small part of the atmosphere?
- A.
Carbon dioxide
- B.
Oxygen
- C.
Argon
- D.
Nitrogen
Correct Answer
A. Carbon dioxideExplanation
Carbon dioxide is the correct answer because it is present in small amounts in the atmosphere, making up only about 0.04% of the total atmospheric gases. Oxygen, nitrogen, and argon, on the other hand, are the main components of the Earth's atmosphere, with nitrogen being the most abundant gas, followed by oxygen and then argon.Rate this question:
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- 11.
What happen if we go higher and higher from the earth surface?
- A.
Amount of gases increases
- B.
Amount of gases decreases
- C.
No change in gases
- D.
Gases become harmfull
Correct Answer
B. Amount of gases decreasesExplanation
As we go higher and higher from the Earth's surface, the atmospheric pressure decreases. This decrease in pressure causes the gases in the atmosphere to become less dense, resulting in a decrease in the amount of gases present. Therefore, the correct answer is that the amount of gases decreases as we go higher from the Earth's surface.Rate this question:
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- 12.
What is the use of Nitrogen to living things?
- A.
In airtight packing of foodstuffs.
- B.
Respiration
- C.
Producing food
- D.
Electric bulbs
Correct Answer
A. In airtight packing of foodstuffs.Explanation
Nitrogen is used in airtight packing of foodstuffs to prevent spoilage and maintain freshness. It helps create an oxygen-free environment, which inhibits the growth of bacteria and other microorganisms that cause food to spoil. This is particularly important for perishable items like fruits, vegetables, and meat. By using nitrogen in packaging, the shelf life of food can be extended, ensuring that it remains safe and of high quality for a longer period of time.Rate this question:
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- 13.
What is the use of Oxygen to living things?
- A.
Airships
- B.
Food production
- C.
Electric bulbs
- D.
Respiration
Correct Answer
D. RespirationExplanation
Oxygen is essential for respiration in living things. During respiration, oxygen is taken in by cells and used to break down glucose and release energy. This process provides the necessary energy for various cellular activities, such as growth, movement, and reproduction. Without oxygen, living organisms would not be able to produce enough energy to survive. Therefore, respiration is the main use of oxygen in living things.Rate this question:
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- 14.
What is the use of Carbon dioxide to living things?
- A.
Food production
- B.
Respiration
- C.
Electric bulbs
- D.
Airships
Correct Answer
A. Food productionExplanation
Carbon dioxide is essential for photosynthesis, a process in which plants convert sunlight, water, and carbon dioxide into glucose and oxygen. Glucose is a source of energy for plants and is used to produce other organic compounds necessary for growth and development. Therefore, carbon dioxide is crucial for food production in plants, which ultimately sustains all living things in the food chain.Rate this question:
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- 15.
Which harmful substances are released in the air through by combustion of fuels?
- A.
Oxygen
- B.
Nitrogen
- C.
Carbon dioxide
- D.
Argon
Correct Answer
C. Carbon dioxideExplanation
During the combustion of fuels, carbon dioxide is released into the air. Combustion is a chemical reaction that occurs when a fuel combines with oxygen to produce heat and light. In this process, carbon atoms from the fuel combine with oxygen atoms from the air, forming carbon dioxide (CO2) as a byproduct. Carbon dioxide is considered a harmful substance in large quantities because it is a greenhouse gas that contributes to global warming and climate change.Rate this question:
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- 16.
How much percent of water on the earth is available for drinking?
- A.
97%
- B.
2.7%
- C.
100%
- D.
0.03%
Correct Answer
D. 0.03%Explanation
Only 0.03% of the water on Earth is available for drinking. The majority of the Earth's water is in the form of saltwater in the oceans, which is not suitable for consumption. This limited availability of freshwater highlights the importance of conservation and efficient use of this precious resource.Rate this question:
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- 17.
How much percent of water on the earth is not available for drinking?
- A.
97%
- B.
2.7%
- C.
0.03%
- D.
100%
Correct Answer
A. 97%Explanation
Approximately 97% of the water on Earth is not available for drinking. This is because the majority of the Earth's water is in the form of saltwater in the oceans, which is not suitable for consumption. Only a small percentage of water, around 2.5%, is freshwater, and out of that, a significant portion is locked in ice caps and glaciers. Therefore, the amount of water that is actually available for drinking is relatively small compared to the total amount of water on Earth.Rate this question:
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- 18.
How much percent of water on the earth is present in form of ice?
- A.
97%
- B.
2.7%
- C.
0.03%
- D.
100%
Correct Answer
B. 2.7%Explanation
Approximately 2.7% of the water on Earth is present in the form of ice. This includes ice caps, glaciers, and icebergs. The majority of Earth's water, about 97%, is found in the oceans as saltwater. The remaining 0.03% is freshwater found in lakes, rivers, and underground sources.Rate this question:
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- 19.
Which of the following activitys should we do to save the water?
- A.
Use water sparingly
- B.
Block water
- C.
Let percolate the water
- D.
All above
Correct Answer
D. All aboveExplanation
The correct answer is "All above" because in order to save water, we should use it sparingly, block water from unnecessary wastage, and allow it to percolate into the ground to replenish groundwater sources. By doing all of these activities, we can effectively conserve and protect our water resources.Rate this question:
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- 20.
It takes about a .................... years for a formation of 2.5 cm layer of a soil.
- A.
Hundred
- B.
Lakhs
- C.
Thousand
- D.
Ten
Correct Answer
C. ThousandExplanation
It takes about a thousand years for a formation of a 2.5 cm layer of soil.Rate this question:
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- 21.
In which of the following growth do not take place?
- A.
Cat
- B.
Man
- C.
Stone
- D.
Plants
Correct Answer
C. StoneExplanation
Stones do not undergo growth as they are non-living and inanimate objects. Growth is a characteristic of living organisms, such as plants, animals, and humans. While plants, cats, and humans all exhibit growth throughout their lifespan, stones remain unchanged in size and structure.Rate this question:
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- 22.
Which of following is necessary for growth of living things?
- A.
Air
- B.
Water
- C.
Shelther
- D.
Food
Correct Answer
D. FoodExplanation
Food is necessary for the growth of living things because it provides the essential nutrients and energy required for cellular processes and development. It is through the process of digestion and absorption that organisms obtain the necessary substances for growth and maintenance of their body. Food provides the building blocks for the synthesis of proteins, carbohydrates, and lipids, which are essential for growth, repair, and functioning of cells. Additionally, food also provides vitamins and minerals that are necessary for various physiological processes and overall health.Rate this question:
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- 23.
Living things inhale which of following gas for respiration?
- A.
Oxygen
- B.
Carbon dioxide
- C.
Nitrogen
- D.
Argon
Correct Answer
A. OxygenExplanation
Living things inhale oxygen for respiration because oxygen is necessary for the process of cellular respiration, where energy is produced in the form of ATP. Oxygen is used by cells to break down glucose and release energy, while carbon dioxide is produced as a waste product. Nitrogen and argon are not involved in the process of respiration and are present in much smaller quantities in the Earth's atmosphere.Rate this question:
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- 24.
Living things exhale which of following gas by respiration?
- A.
Oxygen
- B.
Nitrogen
- C.
Carbon dioxide
- D.
Argon
Correct Answer
C. Carbon dioxideExplanation
Living things exhale carbon dioxide by respiration. During the process of respiration, oxygen is taken in and carbon dioxide is produced as a waste product. This carbon dioxide is then released into the atmosphere through exhalation. Oxygen is used by living organisms for various metabolic processes, while nitrogen is a major component of the air but is not directly involved in respiration. Argon is an inert gas and is not involved in respiration either. Therefore, the correct answer is carbon dioxide.Rate this question:
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- 25.
Which substances are formed during processes of digestion?
- A.
Useful
- B.
Waste
- C.
Harmful
- D.
Both b and c
Correct Answer
D. Both b and cExplanation
During the processes of digestion, both useful substances and waste substances are formed. Useful substances include nutrients such as carbohydrates, proteins, and fats that are broken down and absorbed by the body for energy and growth. Waste substances, on the other hand, include indigestible materials, toxins, and byproducts of metabolism that need to be eliminated from the body. Harmful substances can also be formed during digestion, such as certain toxins or chemicals that may be present in the food or produced during the breakdown of certain compounds. Therefore, the correct answer is "Both b and c."Rate this question:
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- 26.
The living things made of a single cell are called ................
- A.
Unicellular
- B.
Multicellular
- C.
Both a and b
- D.
None of above
Correct Answer
A. UnicellularExplanation
Living things made of a single cell are referred to as unicellular. This means that their entire body is composed of just one cell, which carries out all the necessary functions for survival. Examples of unicellular organisms include bacteria, protozoa, and some types of algae. Multicellular organisms, on the other hand, are made up of multiple cells that work together to form tissues, organs, and systems. Therefore, the correct answer is unicellular.Rate this question:
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- 27.
The living things made of a many cells are called ................
- A.
Unicellular
- B.
Multicellular
- C.
Both a and b
- D.
None of the above
Correct Answer
B. MulticellularExplanation
Living things made of many cells are called multicellular. This term refers to organisms that are composed of multiple cells working together to perform various functions. Multicellular organisms can range from simple organisms like sponges to complex organisms like humans. These organisms have specialized cells that are organized into tissues, organs, and systems, allowing for a higher level of complexity and specialization compared to unicellular organisms.Rate this question:
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- 28.
The animals like mosquitoes and flies are ................... animals
- A.
Useful
- B.
Harmful
- C.
Both a and b
- D.
None of the above
Correct Answer
B. HarmfulExplanation
The animals like mosquitoes and flies are harmful because they are known to carry and transmit diseases to humans and animals. Mosquitoes are vectors for diseases such as malaria, dengue fever, and Zika virus, while flies can spread diseases like cholera and typhoid. Additionally, both mosquitoes and flies can be a nuisance, causing irritation and discomfort with their bites. Therefore, their presence is generally considered harmful to human health and well-being.Rate this question:
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- 29.
The animals like buffalos and cow are ................... animals
- A.
Harmful
- B.
Useful
- C.
Both a and b
- D.
None of above
Correct Answer
B. UsefulExplanation
Buffalos and cows are considered useful animals because they provide various benefits to humans. They are commonly domesticated for their milk, meat, and leather. Additionally, they are used for agricultural purposes, such as plowing fields and carrying heavy loads. These animals also contribute to the economy through the production of dairy products and meat. Therefore, the correct answer is "Useful".Rate this question:
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- 30.
Plants which make their own food are called.....
- A.
Heterotrophic
- B.
Autotrophic
- C.
Insectivores
- D.
None of above
Correct Answer
B. AutotrophicExplanation
Autotrophic plants are capable of producing their own food through the process of photosynthesis. They use sunlight, water, and carbon dioxide to synthesize glucose and release oxygen as a byproduct. This ability to self-feed distinguishes them from heterotrophic plants, which rely on obtaining nutrients from external sources. Insectivores, on the other hand, are organisms that consume insects for their nutrition. Therefore, the correct answer is Autotrophic.Rate this question:
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- 31.
Plants use other plants for food are called.......
- A.
Autotrophic
- B.
Insectivores
- C.
Heterotrophic
- D.
None of above
Correct Answer
C. HeterotrophicExplanation
Plants that use other plants for food are called heterotrophic. Heterotrophic plants obtain nutrients by parasitizing or living off other plants. Unlike autotrophic plants, which can produce their own food through photosynthesis, heterotrophic plants rely on external sources for their nutrition. Insectivores, on the other hand, are organisms that consume insects as their food source. Therefore, the correct answer is heterotrophic.Rate this question:
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- 32.
Plants which consume insect are called......
- A.
Insectivores
- B.
Herbivorous
- C.
Autotrophic
- D.
None of above
Correct Answer
A. InsectivoresExplanation
Plants that consume insects are called insectivores. This is because they obtain nutrients by trapping and digesting insects. Insectivorous plants have evolved various mechanisms to attract, capture, and digest insects, such as sticky traps, pitcher-like structures, or digestive enzymes. These plants usually grow in nutrient-poor environments, where they supplement their diet by consuming insects to obtain essential nutrients like nitrogen and phosphorus. Therefore, the term "insectivores" accurately describes plants that feed on insects.Rate this question:
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- 33.
Which are the parts of plants?
- A.
Stem
- B.
Flower
- C.
Leaf
- D.
All above
Correct Answer
D. All aboveExplanation
The correct answer is "All above" because all of the listed options (stem, flower, and leaf) are parts of plants. The stem provides support and transportation of nutrients, the flower is the reproductive structure, and the leaf is responsible for photosynthesis. Therefore, all of these options are correct in identifying parts of plants.Rate this question:
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- 34.
The plants which bears flowers and fruits for many are called.....
- A.
Shrubs
- B.
Herbs
- C.
Perennial
- D.
Vines
Correct Answer
C. PerennialExplanation
Perennial plants are the correct answer because they are known for their ability to bear flowers and fruits for many years. Unlike annuals, which complete their life cycle in one year, perennials can live for multiple years, continuously producing flowers and fruits. This makes them a popular choice for gardeners who want long-lasting and reliable plants in their landscapes. Shrubs, herbs, and vines can also bear flowers and fruits, but they may not necessarily do so consistently over many years like perennials do.Rate this question:
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- 35.
Some plants grow close to ground are called....
- A.
Shrubs
- B.
Perennial
- C.
Vines
- D.
Herbs
Correct Answer
A. ShrubsExplanation
Shrubs are plants that have woody stems and grow relatively close to the ground. They are characterized by their shorter height and bushy appearance. Unlike trees, shrubs have multiple stems and do not grow as tall. They are often used as decorative plants in gardens and landscaping due to their compact size and ability to fill in spaces. Therefore, the correct answer for the given question is "Shrubs."Rate this question:
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- 36.
Some plants grow 1 to 1.5 metres tall are called.....
- A.
Vines
- B.
Herbs
- C.
Shrubs
- D.
Perennial
Correct Answer
B. HerbsExplanation
Plants that grow 1 to 1.5 meters tall are called herbs. Herbs are a type of plant that typically have soft, non-woody stems and are known for their culinary, medicinal, or aromatic properties. They are often used in cooking, herbal remedies, and for fragrance. Unlike shrubs or vines, which have different growth patterns and characteristics, herbs are generally shorter in height and have a different overall structure. Therefore, the correct answer is herbs.Rate this question:
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- 37.
Some plants grow with support are called.......
- A.
Herbs
- B.
Perennial
- C.
Shrubs
- D.
Vines
Correct Answer
D. VinesExplanation
Vines are plants that grow with support, typically by climbing or trailing along other structures. They have specialized structures such as tendrils or twining stems that allow them to attach themselves to surfaces and grow upwards. Unlike herbs, which are small, non-woody plants, and perennials, which are plants that live for more than two years, vines have a unique growth habit that sets them apart. Shrubs, on the other hand, are woody plants that have multiple stems and are generally shorter than trees. Therefore, the correct answer for plants that grow with support is vines.Rate this question:
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- 38.
Lifecycle of plants complete in one year are called......
- A.
Annual
- B.
Biennial
- C.
Perennial
- D.
None of above
Correct Answer
A. AnnualExplanation
Plants whose lifecycle completes in one year are called annuals. These plants germinate, grow, flower, produce seeds, and die within a span of one year. They typically have a rapid growth rate and complete their entire life cycle in a single growing season. After producing seeds, the plant dies, and the next generation grows from these seeds. Annual plants are commonly used in gardening and agriculture for their ability to provide quick and abundant blooms or harvests.Rate this question:
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- 39.
Lifecycle of plants complete in two years are called........
- A.
Annual
- B.
Perennial
- C.
Biennial
- D.
None of above
Correct Answer
A. AnnualExplanation
Plants whose lifecycle completes in two years are called biennial. Annual plants complete their lifecycle in one year, while perennial plants live for more than two years.Rate this question:
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- 40.
Life cycle of plants complete in many years are called........
- A.
Annual
- B.
Biennial
- C.
Perennial
- D.
None of above
Correct Answer
C. PerennialExplanation
Plants that complete their life cycle over many years are called perennial. Unlike annual plants that complete their life cycle in one year and biennial plants that take two years, perennial plants can live for multiple years, often producing flowers and fruits repeatedly. They have the ability to survive through different seasons and continue to grow year after year. Some common examples of perennial plants include trees, shrubs, and certain types of flowers.Rate this question:
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- 41.
Plants which bears flowers are called.......
- A.
Flowering plants
- B.
Non-flowering plants
- C.
Both a and b
- D.
None of above
Correct Answer
A. Flowering plantsExplanation
Flowering plants are the correct answer because they are the type of plants that produce flowers. Flowers are the reproductive structures of these plants, and they play a crucial role in the process of pollination and seed production. Non-flowering plants, on the other hand, do not produce flowers and reproduce through other means such as spores or cones. Therefore, the term "flowering plants" accurately describes the plants that bear flowers.Rate this question:
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- 42.
Plants which do not bears flowers are called.....mm
- A.
Flowering plants
- B.
None flowering plant's
- C.
Both a and b
- D.
None of above
Correct Answer
B. None flowering plant'sExplanation
The correct answer is "None flowering plant's" because plants that do not produce flowers are referred to as non-flowering plants. This term is used to describe plants such as ferns, mosses, and algae that reproduce through spores or other methods instead of producing flowers and seeds.Rate this question:
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- 43.
Animals with a vertebral column are called.....
- A.
Invertebrates animals
- B.
Vertebrates animals
- C.
Both a and b
- D.
None of above
Correct Answer
B. Vertebrates animalsExplanation
The correct answer is "Vertebrates animals" because animals with a vertebral column, also known as a backbone, are classified as vertebrates. Vertebrates include animals such as mammals, birds, reptiles, amphibians, and fish. In contrast, animals without a vertebral column are called invertebrates, which include insects, worms, mollusks, and crustaceans. Therefore, the correct answer is "Vertebrates animals" as it accurately describes animals with a vertebral column.Rate this question:
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- 44.
Which of following is not a natural disasters?
- A.
Floods
- B.
Stroms
- C.
War
- D.
Earthquake
Correct Answer
C. WarExplanation
War is not considered a natural disaster because it is a man-made event, resulting from conflicts between nations or groups of people. Natural disasters, on the other hand, are caused by natural forces such as weather patterns, geological movements, or environmental factors. Floods, storms, and earthquakes are all examples of natural disasters, as they occur due to natural processes and phenomena. War, however, is a result of human actions and decisions, making it distinct from natural disasters.Rate this question:
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- 45.
Which of the following is not a man-made disaster?
- A.
Floods
- B.
Wars
- C.
Forest fire
- D.
Both b and c
Correct Answer
A. FloodsExplanation
Floods are not a man-made disaster because they are natural occurrences caused by excessive rainfall, overflowing rivers, or tsunamis. While human activities can contribute to the severity of floods, such as deforestation or improper land use, the occurrence of floods itself is not directly caused by human actions. On the other hand, wars and forest fires can be considered man-made disasters as they are caused by human actions and decisions.Rate this question:
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- 46.
Which of following will you do after dog bite?
- A.
Wash a wound with potassium permanganate
- B.
Cover the wound with clean cloth
- C.
Get a doctor help
- D.
All above
Correct Answer
D. All aboveExplanation
After a dog bite, it is important to take immediate action to prevent infection. Washing the wound with potassium permanganate helps to disinfect it and reduce the risk of infection. Covering the wound with a clean cloth helps to protect it from further contamination. Getting a doctor's help is crucial as they can assess the severity of the bite, administer any necessary treatment such as antibiotics or a tetanus shot, and provide guidance on further care. Therefore, all of the mentioned actions should be taken after a dog bite.Rate this question:
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- 47.
Which types of effects is seen after Strom's?
- A.
Loss of life and property
- B.
Save life
- C.
Save property
- D.
Loss of sim card
Correct Answer
A. Loss of life and propertyExplanation
After a storm, the most common types of effects that are seen are the loss of life and property. Storms can be destructive, causing damage to buildings, infrastructure, and natural surroundings. Additionally, storms can result in casualties and loss of life. Therefore, it is expected that the aftermath of a storm would involve the loss of both life and property.Rate this question:
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- 48.
Which types of effects is seen after forest fires?
- A.
Loss of cars
- B.
Loss of houses
- C.
Burns of natural wealth
- D.
None of above
Correct Answer
C. Burns of natural wealthExplanation
Forest fires can cause significant damage to the natural wealth present in the forest. This includes the burning of trees, plants, and other vegetation, leading to the loss of biodiversity and habitat for various species. The fire also destroys the organic matter in the soil, affecting its fertility and nutrient content. Additionally, forest fires can result in the release of harmful pollutants and greenhouse gases into the atmosphere, contributing to air pollution and climate change. Therefore, the correct answer is "Burns of natural wealth."Rate this question:
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- 49.
What should we do on external bleeding?
- A.
Cut the body part
- B.
Put petrol on that part
- C.
Keep the body part above the level of the heart
- D.
All above
Correct Answer
C. Keep the body part above the level of the heartExplanation
When someone is experiencing external bleeding, it is important to keep the affected body part above the level of the heart. This position helps to slow down the blood flow and reduce bleeding. By elevating the body part, gravity assists in preventing excessive blood loss and allows for better clotting. It is a simple yet effective measure that can be taken while waiting for medical help to arrive. Cutting the body part or applying petrol would not be appropriate or helpful in this situation.Rate this question:
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- 50.
Which of the following animal is useful to us?
- A.
Rats
- B.
Earthworm
- C.
Mice
- D.
Fox
Correct Answer
B. EarthwormExplanation
Earthworms are useful to us because they play a vital role in maintaining soil fertility. They help in the decomposition of organic matter, which releases essential nutrients into the soil. This improves soil structure, aeration, and drainage, making it more conducive for plant growth. Additionally, earthworms enhance soil fertility by increasing microbial activity and nutrient availability. They also help in controlling pests and diseases by preying on their eggs and larvae. Overall, earthworms are beneficial for agriculture and gardening, making them useful to us.Rate this question:
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