SOL review 2 short

Front

What is an independent variable in an experiment?

Back

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

Front

In an experiment studying plant growth, if the soil type is changed while keeping other factors constant, what is the independent variable?

Back

Soil type.

Front

What is a dependent variable in an experiment?

Back

A dependent variable is the factor that is measured or observed in an experiment, which is affected by changes in the independent variable.

Front

In the study of orchids, if the percentage of humidity is varied to observe its effect on flowering, what is the dependent variable?

Back

The number of flowers on each plant.

Front

How is population density defined?

Back

Population density is defined as the number of individuals of a species per unit area.

Front

What is the formula for calculating population density?

Back

Population Density = Total Number of Individuals / Area.

Front

What is a conclusion in scientific research?

Back

A conclusion is a summary of the results of an experiment, stating whether the hypothesis was supported or not.

Front

If a student observes that earthworms move away from light, what type of statement is this?

Back

This is a conclusion.

Front

What is the purpose of a control group in an experiment?

Back

A control group is used as a standard for comparison to determine the effect of the independent variable.

Front

In a study about the effects of a new highway on wildflower species, what is the best approach to assess the impact?

Back

Sampling flowers both before and after highway construction is completed.