NWEA Science Practice Test 2

Front

What is the role of decomposers in an ecosystem?

Back

To break down dead organisms and organic matter, returning nutrients to the soil for other organisms to use.

Front

What are the different levels of a food chain in an ecosystem?

Back

Producers, primary consumers, secondary consumers, and tertiary consumers.

Front

How do human activities impact the balance of an ecosystem?

Back

Human activities can impact the balance of an ecosystem in various ways such as habitat destruction, pollution, introduction of invasive species, and overexploitation of natural resources.

Front

How do human activities contribute to changes in climate?

Back

By releasing greenhouse gases.

Front

What are the different forms of energy in an ecosystem?

Back

Solar, chemical, and heat energy.

Front

How is energy transferred through photosynthesis?

Back

Plants convert solar energy into chemical energy during photosynthesis.

Front

What is a producer in an ecosystem?

Back

An organism that can make its own food, typically through photosynthesis.

Front

What is a primary consumer?

Back

An organism that eats producers; usually herbivores.

Front

What is a secondary consumer?

Back

An organism that eats primary consumers; usually carnivores.

Front

What is a tertiary consumer?

Back

An organism that eats secondary consumers; often top predators.