Ecosystems Quiz
Test your knowledge of the Ecosystems, as part of GCSE Biology with this quiz.
This quiz consists of 15 questions, including multiple-choice and short-answer questions on the topic of Ecosystems for GCSE Biology.
For multiple-choice questions, choose the correct answer. Scroll down to begin the quiz.
Questions
What is biodiversity?
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Which process returns carbon to the atmosphere in the carbon cycle?
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Which of the following is a cause of deforestation?
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Which level of a food chain has the most energy available?
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What is a disadvantage of using fertilisers in farming?
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What is an ecosystem?
An ecosystem is a community of interacting organisms and their physical environment, including both living (biotic) and non-living (abiotic) components.
Name two ways in which carbon is recycled in an ecosystem.
Respiration: Releases carbon dioxide back into the atmosphere.
Decomposition: Microorganisms break down dead organisms, returning carbon to the soil and air.
What is one negative impact of global warming on biodiversity?
Global warming can lead to habitat loss, which reduces species populations and can lead to extinction.
Why is energy lost at each trophic level in a food chain?
Energy is lost as heat through respiration, movement, and excretion, meaning only a small percentage is passed on to the next trophic level.
Give one reason why maintaining biodiversity is important.
Biodiversity ensures ecosystem stability, providing essential services like pollination, nutrient cycling, and climate regulation.
How does intensive farming affect the environment?
Intensive farming can lead to habitat destruction, soil degradation, and pollution from pesticides and fertilisers.
What is sustainable farming and why is it important?
Sustainable farming involves practices that protect the environment while maintaining food production, such as crop rotation and organic farming, to prevent soil depletion and pollution.
Describe two ways farmers can increase food security.
Using high-yield crops or GM crops to produce more food.
Reducing food waste by improving storage and distribution.
Why is decomposer activity essential in an ecosystem?
Decomposers break down dead organisms and waste, recycling nutrients like carbon and nitrogen back into the soil for plant growth.
What is the role of nitrogen-fixing bacteria in the nitrogen cycle?
Nitrogen-fixing bacteria convert atmospheric nitrogen into nitrates, which plants can absorb and use for growth.
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