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 10
A pond ecosystem contains algae, small fish, large fish, and birds. If the population of small fish decreases significantly, what is a likely effect on the large fish population?
Describe one way human activities can negatively impact ecosystems.
Describe the role of producers in an ecosystem.
Explain the difference between a food chain and a food web.
Explain the difference between primary and secondary succession.
Explain what is meant by the term 'biome'.
A grassland ecosystem has 10,000 kJ of energy at the producer level. If only 10% of energy is transferred to each trophic level, how much energy is available to primary consumers?
A pond ecosystem contains algae, small fish, large fish, and birds. If the population of small fish decreases significantly, what is a likely effect on the large fish population?
Decomposers play a vital role in ecosystems by: (1) Producing food (2) Breaking down dead matter (3) Consuming producers (4) Competing with herbivores
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 the term 'niche'? (1) The physical space an organism occupies (2) The role an organism plays in its ecosystem (3) The number of individuals in a population (4) The amount of food available
Which of the following best describes the term 'trophic level'? (1) The rate of photosynthesis in plants (2) The position an organism occupies in a food chain (3) The amount of water in an ecosystem (4) The number of species in a habitat
Fill in the blank: The gradual process by which ecosystems change and develop over time is called __________.
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 total amount of living matter in a given area at a given time is called __________.
True or False: All energy in an ecosystem ultimately comes from the sun.
True or False: Biodiversity increases the stability of an ecosystem.
True or False: Energy flow in an ecosystem is unidirectional.
True or False: In an energy pyramid, the energy available decreases as you move up each trophic level.
