Ecosystems
Biology ⇒ Ecology and Environment
Ecosystems starts at 6 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Ecosystems.
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See sample questions for grade 9
A pond ecosystem contains algae, small fish, large fish, and birds. If the population of small fish decreases, what is likely to happen to the population of large fish?
Describe one way in which climate change can affect ecosystems.
Describe one way in which human activities can disrupt ecosystems.
Describe what happens to the population of prey if the number of predators increases in an ecosystem.
Explain the difference between a food chain and a food web.
Explain the difference between primary and secondary succession.
Explain the role of sunlight in an ecosystem.
A pond ecosystem contains algae, small fish, large fish, and birds. If the population of small fish decreases, what is likely to happen to the population of large fish?
Which level of the food chain has the most available energy? (1) Producers (2) Primary consumers (3) Secondary consumers (4) Tertiary consumers
Which of the following best defines an ecosystem? (1) A group of organisms of the same species living in the same area (2) The physical environment only (3) A community of living organisms interacting with each other and their non-living environment (4) The atmosphere above a forest
Which of the following best describes a trophic level? (1) The physical location of an organism (2) The feeding position of an organism in a food chain (3) The age of an organism (4) The reproductive rate of an organism
Which of the following best describes ecological succession? (1) The extinction of a species (2) The gradual process of change in the species structure of an ecosystem over time (3) The migration of animals (4) The increase in population size
Decomposers play a vital role in ecosystems by breaking down __________.
Fill in the blank: The maximum number of individuals of a species that an environment can support is called its __________.
Fill in the blank: The movement of water, carbon, nitrogen, and other elements through the living and non-living parts of an ecosystem is called a __________ cycle.
Fill in the blank: The non-living physical and chemical parts of an ecosystem are called __________ factors.
True or False: All ecosystems have the same level of biodiversity.
True or False: All energy in an ecosystem ultimately comes from the sun.
True or False: Carnivores are always at the top of the food chain.
True or False: Energy flow in an ecosystem is unidirectional.
