APES Fall Review

Front

How does the removal of earthworms from the food chain affect other organisms?

Back

The number of crayfish will decrease because earthworms are a food source for them.

Front

What is the factor that an experimenter changes on purpose in an experiment?

Back

Independent Variable: The variable that is changed or controlled in a scientific experiment.

Front

What type of consumer is a wolf?

Back

Carnivore: An organism that primarily eats meat.

Front

What is the texture of soil that is 60% clay, 30% silt, and 10% sand?

Back

Clay: A soil texture that is primarily composed of clay particles.

Front

What causes the movement of tectonic plates?

Back

Convection currents in the Asthenosphere: These currents in the semi-fluid layer of the Earth drive the movement of tectonic plates.

Front

Define 'omnivore'.

Back

An organism that eats both plants and animals.

Front

What is a 'decomposer'?

Back

An organism that breaks down dead or decaying organisms, returning nutrients to the soil.

Front

What is the role of a 'herbivore' in an ecosystem?

Back

An organism that primarily eats plants.

Front

Explain the term 'food chain'.

Back

A linear sequence of organisms through which nutrients and energy pass as one organism eats another.

Front

What is the difference between a 'dependent variable' and an 'independent variable'?

Back

The dependent variable is what is measured in an experiment, while the independent variable is what is changed.