Our Environment (10 Science)
Our environment consists of living and non-living components that interact with each other. Understanding environmental ecosystems and food chains helps us
TL;DR: Our environment consists of living and non-living components that interact with each other. Understanding environmental ecosystems and food chains hel…
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Our environment consists of living and non-living components that interact with each other. Understanding environmental ecosystems and food chains helps us
Our Environment MCQs with Answers & Explanations
Q1. What is an ecosystem?
- Only plants in an area
- Only animals in an area
- Living organisms and their physical environment in an area ✓ (correct)
- Only soil
Q2. What are producers in an ecosystem?
- Animals that eat plants
- Green plants that make their own food ✓ (correct)
- Organisms that decompose
- Humans
Q3. What are decomposers in an ecosystem?
- Herbivores
- Carnivores
- Organisms that break down dead organic matter ✓ (correct)
- Parasites
Q4. What is a food chain?
- A chain of restaurants
- A sequence showing energy transfer from producers to consumers ✓ (correct)
- A line of animals
- A type of food
Q5. What percentage of energy is transferred from one trophic level to the next?
- 50%
- 25%
- 10% ✓ (correct)
- 100%
Q6. What is biomagnification?
- Increase in organism size
- Accumulation of toxic substances in higher trophic levels ✓ (correct)
- Growth of biomass
- Increase in food chain length
Q7. What is the main cause of ozone layer depletion?
- Carbon dioxide
- Chlorofluorocarbons (CFCs) ✓ (correct)
- Nitrogen oxides
- Methane
Q8. What is the greenhouse effect?
- Growing plants in a greenhouse
- Trapping of heat in the atmosphere by gases ✓ (correct)
- Depletion of ozone
- Acid rain
Q9. Which gas is primarily responsible for global warming?
- Oxygen
- Nitrogen
- Carbon dioxide ✓ (correct)
- Argon
Q10. What is waste management?
- Throwing waste away
- Minimize waste and dispose responsibly through reduce, reuse, recycle ✓ (correct)
- Burning waste
- Burying waste
Frequently Asked Questions
What is the difference between a biotic and abiotic factor?
Biotic factors are all living organisms in an ecosystem (plants, animals, microorganisms), while abiotic factors are non-living components (temperature, light, soil, water, atmosphere).
How does the nitrogen cycle work?
Nitrogen in the atmosphere is converted to usable forms by nitrogen-fixing bacteria in soil and legume plants. Plants use this nitrogen, animals eat plants, and decomposers return nitrogen to soil when organisms die.
More 10 Science MCQs
- Light Reflection and Refraction
- Electricity
- Acids Bases and Salts
- Life Processes
- Carbon and its Compounds
- Metals and Non-metals
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