ACT Science Prep Exam

Front

What is a compound?

Back

A substance made up of more than one element.

Front

What is a dependent variable?

Back

The observed variable in an experiment whose changes are determined by the presence or degree of one or more independent variables.

Front

What is the vaccination rate in Australia as of August 2021?

Back

36%.

Front

Which pigment has the highest absorption rate at 500 nm wavelength?

Back

Chlorophyll B.

Front

What is typically represented on the x-axis of a graph measuring sound intensity?

Back

Intensity (dB).

Front

Define independent variable.

Back

The variable that is manipulated or changed in an experiment to test its effects on the dependent variable.

Front

What is a control variable?

Back

A variable that is kept constant throughout an experiment to ensure that the results are due to the independent variable.

Front

Explain the significance of chlorophyll in photosynthesis.

Back

Chlorophyll absorbs light energy, primarily in the blue and red wavelengths, which is essential for the process of photosynthesis.

Front

What does a graph's y-axis typically represent in a scientific experiment?

Back

The dependent variable being measured.

Front

What is the purpose of a hypothesis in scientific research?

Back

A hypothesis is a testable prediction about the relationship between two or more variables.