AQA Ecosystems

Which are examples of abiotic factors?

• Trees

• Rocks

• Air

• Fish

What word do we use to describe the relationship between biotic and abiotic factors in an ecosystem?

• Interdependent

• Independent

• Intradependent

• Dependent

What do we call organisms which take their energy from the sun?

• Primary consumers

• Producers

• Decomposers

• Photosynthesisers

What is a group of different organisms called?

• A population

• A community

• A biome

• An individual

What do we call a large-scale ecosystem?

• Biosphere

• Population

• Environment

• Biome

What two climatic conditions produce tropical rainforests?

• High solar radiation

• Low air pressure

• Low solar radiation

• High air pressure

What two climatic conditions produce arid deserts?

• High solar radiation

• Low air pressure

• Low solar radiation

• High air pressure

What is living plant matter called in the nutrient cycle?

• Soil

• Biomass

• Litter

• Abiotic

What do we call the washing out of nutrients from the soil by rainfall?

• Leaching

• Surface runoff

• Weathering

• Decomposition

What role do decomposers play in the nutrient cycle?

• Break down litter and return nutrients to the soil

• Take up nutrients from the soil through their roots

• Cause leaf litter to fall from tree branches