Variables, Constants, & Experiments

A group of students is conducting an experiment to see how different amounts of sunlight affect the growth of tomato plants. They use three groups of plants: one group receives 4 hours of sunlight, another receives 8 hours, and the last group receives 12 hours. All plants are given the same amount of water and are planted in the same type of soil. What is the independent variable in this experiment?

• Amount of water

• Type of soil

• Amount of sunlight

• Growth of tomato plants

Tags

DOK Level 1: Recall

A group of students is conducting an experiment to see how different amounts of sunlight affect the growth of tomato plants. They use three groups of plants: one group receives 4 hours of sunlight, another receives 8 hours, and the last group receives 12 hours. All plants are given the same amount of water and are planted in the same type of soil.

What is the dependent variable?

• Amount of water

• Type of soil

• Amount of sunlight

• Growth of tomato plants

Tags

DOK Level 1: Recall

A group of students is conducting an experiment to see how different amounts of sunlight affect the growth of tomato plants. They use three groups of plants: one group receives 4 hours of sunlight, another receives 8 hours, and the last group receives 12 hours. All plants are given the same amount of water and are planted in the same type of soil.

What is the control group in the tomato plant experiment?

• Plants receiving 4 hours of sunlight

• Plants receiving 8 hours of sunlight

• Plants receiving 12 hours of sunlight

• There is no control group

Tags

DOK Level 2: Skill/Concept

In an experiment to test the effectiveness of a lever, students use a lever to lift different weights. They measure the force needed to lift each weight.

What is the independent variable?

• Length of the lever

• Force needed to lift the weight

• Different weights

• Type of lever

Tags

DOK Level 1: Recall

In an experiment to test the effectiveness of a lever, students use a lever to lift different weights. They measure the force needed to lift each weight.

What is the dependent variable in the lever experiment?

• Length of the lever

• Force needed to lift the weight

• Different weights

• Type of lever

Tags

DOK Level 1: Recall

In an experiment where students observe how temperature affects the state of water, they heat water and record the temperature at which it turns into steam.

What is the independent variable?

• Temperature

• State of water

• Amount of water

• Time taken to heat

Tags

DOK Level 1: Recall

In an experiment where students observe how temperature affects the state of water, they heat water and record the temperature at which it turns into steam.

What is the dependent variable in the water state experiment?

• Temperature

• State of water

• Amount of water

• Time taken to heat

Tags

DOK Level 1: Recall

In a weather observation experiment, students record the temperature, humidity, and wind speed over a week to see how these factors affect cloud formation.

What is the independent variable?

• Temperature

• Humidity

• Wind speed

• Cloud formation

Tags

DOK Level 2: Skill/Concept

In a weather observation experiment, students record the temperature, humidity, and wind speed over a week to see how these factors affect cloud formation.

What is the dependent variable in the weather observation experiment?

• Temperature

• Humidity

• Wind speed

• Cloud formation

Tags

DOK Level 2: Skill/Concept

In an experiment to understand the human respiratory system, students measure the amount of air exhaled after different exercises.

What is the independent variable?

• Type of exercise

• Amount of air exhaled

• Time of exercise

• Breathing rate

Tags

DOK Level 1: Recall