Environment MCQ & Objective Questions
The study of the environment is crucial for students preparing for school and competitive exams. Understanding environmental concepts not only enhances your knowledge but also helps in scoring better. Practicing MCQs and objective questions related to the environment allows you to grasp important topics effectively, making your exam preparation more efficient. With a focus on practice questions, you can tackle important questions with confidence.
What You Will Practise Here
Fundamentals of Ecology and Ecosystems
Types of Natural Resources and Their Conservation
Environmental Pollution: Causes and Effects
Climate Change and Global Warming
Biodiversity and Its Importance
Environmental Laws and Policies in India
Renewable and Non-Renewable Energy Sources
Exam Relevance
The topic of the environment is significant in various examinations such as CBSE, State Boards, NEET, and JEE. Questions often focus on the impact of human activities on the environment, conservation methods, and ecological principles. Common question patterns include multiple-choice questions that test your understanding of definitions, causes, and effects related to environmental issues. By mastering these concepts, you can enhance your performance in these competitive exams.
Common Mistakes Students Make
Confusing terms like 'biodegradable' and 'non-biodegradable'
Misunderstanding the causes and effects of pollution
Overlooking the significance of biodiversity
Neglecting the impact of climate change on ecosystems
FAQs
Question: What are some important Environment MCQ questions I should focus on?Answer: Focus on questions related to pollution types, conservation methods, and ecological relationships for a well-rounded understanding.
Question: How can I improve my performance in Environment objective questions?Answer: Regular practice of MCQs and reviewing key concepts will significantly enhance your performance.
Start solving practice MCQs today to test your understanding of the environment and boost your exam readiness. Remember, consistent practice is the key to success!
Q. If a wind turbine generates 2 MW of power and operates for 10 hours, how much energy does it produce?
A.
20 MWh
B.
15 MWh
C.
25 MWh
D.
30 MWh
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Solution
Energy produced = 2 MW * 10 hours = 20 MWh
Correct Answer:
A
— 20 MWh
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Q. In a biodiversity study, 15 different species of plants were found in a 1000 m² area. What is the average area occupied by each species?
A.
50 m²
B.
60 m²
C.
70 m²
D.
80 m²
Show solution
Solution
1000 m² / 15 species = 66.67 m² per species, rounded down to 50 m².
Correct Answer:
A
— 50 m²
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Q. In a biodiversity study, 15 different species were found in a 1000 m² area. What is the average number of species per 100 m²?
A.
1.5
B.
3
C.
15
D.
0.15
Show solution
Solution
15 species / 10 = 1.5 species per 100 m².
Correct Answer:
B
— 3
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Q. In a biodiversity study, 15 different species were found in a 1000 square meter area. What is the average number of species per 100 square meters?
Show solution
Solution
15 species / 10 = 1.5 species per 100 square meters.
Correct Answer:
B
— 2
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Q. In a biodiversity study, researchers found that 15% of the 1200 species observed were new to science. How many new species were discovered?
A.
150
B.
180
C.
120
D.
200
Show solution
Solution
15% of 1200 is 180, so 180 new species were discovered.
Correct Answer:
B
— 180
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Q. In a conservation program, 60% of the 500 animals are released back into the wild. How many animals are released?
A.
300
B.
250
C.
200
D.
350
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Solution
60% of 500 is 300, so 300 animals are released.
Correct Answer:
A
— 300
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Q. In a conservation project, 40% of the budget is allocated to habitat restoration. If the total budget is $200,000, how much is allocated for habitat restoration?
A.
$60,000
B.
$70,000
C.
$80,000
D.
$90,000
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Solution
$200,000 * 40% = $80,000 allocated for habitat restoration.
Correct Answer:
C
— $80,000
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Q. In a food chain, which organism is typically at the top?
A.
Producer
B.
Primary Consumer
C.
Secondary Consumer
D.
Tertiary Consumer
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Solution
Tertiary consumers are at the top of the food chain as they are the top predators.
Correct Answer:
D
— Tertiary Consumer
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Q. In a study, it was found that 25% of a certain habitat is covered by water. If the total area of the habitat is 800 acres, how many acres are covered by water?
A.
100 acres
B.
150 acres
C.
200 acres
D.
250 acres
Show solution
Solution
800 acres * 25% = 200 acres covered by water.
Correct Answer:
C
— 200 acres
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Q. In a study, it was found that 25% of a coral reef has been damaged. If the total area of the reef is 2000 m², how much area is damaged?
A.
400 m²
B.
500 m²
C.
600 m²
D.
700 m²
Show solution
Solution
25% of 2000 m² = 0.25 * 2000 = 500 m² damaged.
Correct Answer:
A
— 400 m²
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Q. In a study, it was found that 25% of a population of 800 animals are herbivores. How many herbivores are there?
A.
150
B.
200
C.
250
D.
300
Show solution
Solution
25% of 800 = 0.25 * 800 = 200 herbivores.
Correct Answer:
B
— 200
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Q. What is biodiversity hotspot? (2019)
A.
An area with high species richness
B.
An area with low species richness
C.
An area with only endemic species
D.
An area with no human impact
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Solution
A biodiversity hotspot is an area that is both rich in species and threatened by human activities.
Correct Answer:
A
— An area with high species richness
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Q. What is the main cause of acid rain? (2019)
A.
Carbon Dioxide
B.
Sulfur Dioxide
C.
Nitrogen Oxides
D.
Methane
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Solution
Acid rain is primarily caused by sulfur dioxide (SO2) and nitrogen oxides (NOx) which react with water vapor in the atmosphere.
Correct Answer:
B
— Sulfur Dioxide
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Q. What is the main cause of biodiversity loss?
A.
Climate Change
B.
Pollution
C.
Habitat Destruction
D.
Overfishing
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Solution
Habitat destruction is the leading cause of biodiversity loss as it directly removes the living spaces of many species.
Correct Answer:
C
— Habitat Destruction
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Q. What is the main cause of habitat destruction? (2021)
A.
Natural disasters
B.
Urbanization
C.
Climate change
D.
Invasive species
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Solution
Urbanization is a major cause of habitat destruction as it leads to the conversion of natural land into urban areas.
Correct Answer:
B
— Urbanization
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Q. What is the main source of freshwater on Earth? (2019)
A.
Rivers
B.
Lakes
C.
Glaciers
D.
Groundwater
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Solution
Glaciers are the main source of freshwater on Earth, storing about 68.7% of the world's freshwater supply.
Correct Answer:
C
— Glaciers
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Q. What is the primary goal of conservation biology?
A.
Increase biodiversity
B.
Reduce pollution
C.
Promote urban development
D.
Enhance agriculture
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Solution
The primary goal of conservation biology is to increase and protect biodiversity.
Correct Answer:
A
— Increase biodiversity
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Q. What is the primary purpose of the Kyoto Protocol? (2018)
A.
To promote biodiversity
B.
To reduce greenhouse gas emissions
C.
To protect endangered species
D.
To manage water resources
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Solution
The Kyoto Protocol is an international treaty aimed at reducing greenhouse gas emissions to combat climate change.
Correct Answer:
B
— To reduce greenhouse gas emissions
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Q. What is the process of converting waste materials into reusable materials called?
A.
Recycling
B.
Composting
C.
Incineration
D.
Landfilling
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Solution
Recycling is the process of converting waste materials into reusable materials.
Correct Answer:
A
— Recycling
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Q. What is the role of decomposers in an ecosystem? (2023)
A.
Producers
B.
Consumers
C.
Nutrient recyclers
D.
Predators
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Solution
Decomposers play the role of nutrient recyclers by breaking down dead organic matter and returning nutrients to the soil.
Correct Answer:
C
— Nutrient recyclers
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Q. What is the term for the variety of life in the world or in a particular habitat? (2021)
A.
Ecosystem
B.
Biodiversity
C.
Habitat
D.
Population
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Solution
Biodiversity refers to the variety of life in the world or in a particular habitat, including the variety of species, genetic diversity, and ecosystem diversity.
Correct Answer:
B
— Biodiversity
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Q. What term describes the variety of life in a particular habitat? (2019)
A.
Ecosystem diversity
B.
Genetic diversity
C.
Species diversity
D.
Population diversity
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Solution
Species diversity refers to the variety of different species within a particular habitat.
Correct Answer:
C
— Species diversity
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Q. Which ecosystem is known for having the highest biodiversity?
A.
Desert
B.
Tundra
C.
Rainforest
D.
Grassland
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Solution
Rainforests are known for having the highest biodiversity due to their warm climate and abundant rainfall.
Correct Answer:
C
— Rainforest
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Q. Which gas is primarily responsible for global warming?
A.
Oxygen
B.
Carbon Dioxide
C.
Nitrogen
D.
Argon
Show solution
Solution
Carbon Dioxide is the gas primarily responsible for global warming due to its greenhouse effect.
Correct Answer:
B
— Carbon Dioxide
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Q. Which layer of the atmosphere contains the ozone layer? (2020)
A.
Troposphere
B.
Stratosphere
C.
Mesosphere
D.
Thermosphere
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Solution
The ozone layer is located in the Stratosphere, which absorbs and scatters ultraviolet solar radiation.
Correct Answer:
B
— Stratosphere
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Q. Which of the following is a consequence of deforestation? (2020)
A.
Increased biodiversity
B.
Soil erosion
C.
Improved air quality
D.
Increased rainfall
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Solution
Deforestation leads to soil erosion as trees that hold the soil in place are removed, making the soil more susceptible to being washed away.
Correct Answer:
B
— Soil erosion
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Q. Which of the following is a method of conservation?
A.
Deforestation
B.
Pollution
C.
Reforestation
D.
Urbanization
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Solution
Reforestation is a method of conservation that involves planting trees to restore lost forests.
Correct Answer:
C
— Reforestation
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Q. Which of the following is a method of conserving biodiversity? (2022)
A.
Deforestation
B.
Habitat restoration
C.
Pollution
D.
Overfishing
Show solution
Solution
Habitat restoration is a method of conserving biodiversity by restoring ecosystems to their natural state.
Correct Answer:
B
— Habitat restoration
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Q. Which of the following is NOT a consequence of climate change? (2022)
A.
Rising sea levels
B.
Increased frequency of extreme weather events
C.
Decreased agricultural productivity
D.
Stable weather patterns
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Solution
Stable weather patterns are NOT a consequence of climate change; in fact, climate change leads to increased variability and extreme weather events.
Correct Answer:
D
— Stable weather patterns
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Q. Which of the following is NOT a greenhouse gas?
A.
Carbon Dioxide
B.
Methane
C.
Oxygen
D.
Nitrous Oxide
Show solution
Solution
Oxygen is not a greenhouse gas; it does not trap heat in the atmosphere like the others.
Correct Answer:
C
— Oxygen
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