Unit 2 Review

Front

What is an independent variable?

Back

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

Front

In an experiment, if the amount of light is changed to observe its effect on plant growth, what is the independent variable?

Back

The amount of light.

Front

What measurement system do scientists commonly use?

Back

The Metric System.

Front

What is the difference between unicellular and multicellular organisms?

Back

Unicellular organisms are made of a single cell, while multicellular organisms are made of many cells.

Front

What is quantitative data?

Back

Quantitative data is information that can be measured and expressed numerically.

Front

Give an example of quantitative data.

Back

The growth of the plants measured in centimeters.

Front

What is qualitative data?

Back

Qualitative data is descriptive information that cannot be measured numerically.

Front

Give an example of qualitative data.

Back

The color of the plants.

Front

What is the purpose of a controlled experiment?

Back

To isolate the effects of the independent variable by keeping other variables constant.

Front

What is a hypothesis?

Back

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