Exploring Variables in Experiments

Mason is conducting an experiment to study the effect of different amounts of water on plant growth. Which of the following is the independent variable?

• Type of plant

• Amount of water

• Growth rate of the plant

• Type of soil

Tags

DOK Level 2: Skill/Concept

Aria is investigating how temperature affects the rate at which ice melts. What is the dependent variable in this experiment?

• Temperature

• Amount of ice

• Rate of melting

• Type of container

Tags

DOK Level 2: Skill/Concept

Mia is conducting an experiment to determine how light intensity affects the growth of a plant. Which factor should be kept constant?

• Light intensity

• Type of plant

• Growth rate

• Amount of water

Tags

DOK Level 2: Skill/Concept

Braxton is conducting an experiment to test the effect of temperature on the rate of a chemical reaction. Which of the following is an independent variable in her experiment?

• Type of reactants

• Temperature

• Volume of reactants

• Time of reaction

Tags

DOK Level 2: Skill/Concept

Olivia is conducting a study to see how different surfaces affect the speed of a rolling ball. What is the dependent variable?

• Type of surface

• Mass of the ball

• Speed of the ball

• Angle of the surface

Tags

DOK Level 2: Skill/Concept

When investigating the effect of light intensity on the rate of photosynthesis, which of the following should be a constant?

• Light intensity

• Type of plant

• Rate of photosynthesis

• Temperature

Tags

DOK Level 2: Skill/Concept

Abigail is conducting an experiment to see how friction affects the distance a toy car travels. Which of the following is the independent variable?

• Type of surface

• Distance traveled

• Weight of the car

• Initial speed

Tags

DOK Level 2: Skill/Concept

A student is testing how different colors of light affect plant growth. What is the dependent variable in this experiment?

• Color of light

• Type of plant

• Growth of the plant

• Amount of water

Tags

DOK Level 2: Skill/Concept

In an experiment to determine how temperature affects the viscosity of a liquid, which factor should be kept constant?

• Type of liquid

• Temperature

• Viscosity

• Volume of liquid

Tags

DOK Level 2: Skill/Concept

Which of the following is an independent variable in an experiment to test the effect of light intensity on the opening of flower petals?

• Type of flower

• Light intensity

• Time of day

• Temperature

Tags

DOK Level 2: Skill/Concept