Virginia Biology SOL Practice Test – Version 5 (50 Questions)

Students designed an experiment to test how water temperature affects the rate of sugar dissolving. They used equal amounts of sugar and stirred each solution for 30 seconds. Beaker A had cold water (10°C), Beaker B had warm water (30°C), and Beaker C had hot water (60°C). The sugar dissolved fastest in Beaker C.

• Amount of sugar

• Temperature of water

• Stirring time

• Type of beaker

Students designed an experiment to test how water temperature affects the rate of sugar dissolving. They used equal amounts of sugar and stirred each solution for 30 seconds. Beaker A had cold water (10°C), Beaker B had warm water (30°C), and Beaker C had hot water (60°C). The sugar dissolved fastest in Beaker C. The dependent variable in the experiment above is—

• Temperature of water

• Amount of sugar

• Rate of dissolving

• Type of sugar

Students designed an experiment to test how water temperature affects the rate of sugar dissolving. They used equal amounts of sugar and stirred each solution for 30 seconds. Beaker A had cold water (10°C), Beaker B had warm water (30°C), and Beaker C had hot water (60°C). The sugar dissolved fastest in Beaker C.

• Hotter water dissolves sugar faster.

• Temperature has no effect on dissolving.

• Stirring increases solubility.

• Cold water dissolves sugar fastest.

Two scientists conduct the same experiment testing the effect of light on algae growth. Their results are similar but not identical. They repeat the experiment five times with larger samples and find consistent results.

• It increases validity and reliability.

• It guarantees perfect results.

• It changes the hypothesis.

• It allows different variables to be tested.

A control group is important because it—

• Proves a hypothesis

• Provides a comparison

• Reduces constants

• Makes results faster

Which graph is best for showing population growth over time?

• Pie chart

• Line graph

• Bar graph

• Table

Which type of data is “the leaf measured 5 cm”?

• Qualitative

• Quantitative

• Descriptive

• Hypothetical

Which type of statement is testable in a scientific experiment?

• Music helps plants feel happier.

• Plants grow taller under red light.

• Flowers are prettier in spring.

• Blue is the best color.

A biology student measures the height of ten pea plants weekly for five weeks. Which variable is the dependent variable?

• A. Plant height

• B. Type of soil

• C. Amount of sunlight

• D. Number of plants

A scientific theory is—

• A guess

• A hypothesis

• A well-supported explanation

• A single experiment result