CAST Science Practice Test

Front

What is a dependent variable?

Back

A dependent variable is the variable that is measured in an experiment. It is affected by changes in the independent variable.

Front

What is an independent variable?

Back

An independent variable is the variable that is changed or controlled in an experiment to test its effects on the dependent variable.

Front

What is the relationship between mass and gravitational force?

Back

Both mass and distance are variables that affect the gravitational force between two objects.

Front

What does it mean if a layer of rock is at the top?

Back

The layer at the top is the youngest layer in a sequence of sedimentary rock layers.

Front

What happens to the sea urchin population when the kelp population increases?

Back

The sea urchin population decreases as the kelp population increases.

Front

What is a control in an experiment?

Back

A control is a standard against which the results of an experiment are compared. It is not changed during the experiment.

Front

What is the significance of a food web?

Back

A food web illustrates the feeding relationships between organisms in an ecosystem, showing how energy and nutrients flow.

Front

What is the New Moon phase?

Back

The New Moon phase occurs when the Moon is positioned between the Earth and the Sun, making it invisible from Earth.

Front

What is the purpose of conducting multiple trials in an experiment?

Back

Conducting multiple trials helps to ensure the reliability and accuracy of the results.

Front

What is the scientific method?

Back

The scientific method is a systematic process for investigating phenomena, acquiring new knowledge, or correcting and integrating previous knowledge.