Identifying Variables

In an experiment to see how the amount of sunlight affects the growth of a plant, what is the independent variable?

• The type of plant

• The amount of sunlight

• The height of the plant

• The amount of water

Tags

NGSS.MS-LS1-5

A scientist changes the temperature of water to see how fast sugar dissolves. What is the dependent variable?

• The amount of sugar

• The temperature of the water

• The time it takes for sugar to dissolve

• The type of container

If a student tests how the number of hours spent studying affects test scores, what is the independent variable?

• The test scores

• The number of hours spent studying

• The type of test

• The number of students

In an experiment where different amounts of fertilizer are added to plants to see how tall they grow, what is the dependent variable?

• The amount of fertilizer

• The type of plant

• The height of the plants

• The amount of sunlight

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

A researcher wants to know if the color of light affects how quickly a plant grows. What is the independent variable?

• The color of light

• The type of plant

• The speed of plant growth

• The amount of water

Tags

NGSS.MS-LS1-6

A student measures how the amount of salt in water affects the boiling point. What is the dependent variable?

• The amount of salt

• The boiling point of water

• The type of pot used

• The amount of water

Tags

NGSS.MS-PS3-4

If a teacher wants to see if listening to music while studying affects students' test scores, what is the dependent variable?

• The type of music

• The amount of time spent studying

• The students' test scores

• The number of students

A scientist is testing how the type of soil affects the number of tomatoes produced by a plant. What is the independent variable?

• The number of tomatoes produced

• The type of soil

• The amount of water

• The type of plant

Tags

NGSS.MS-LS1-5

A student wants to find out if the speed of a toy car changes when the ramp height is increased. What is the dependent variable?

• The height of the ramp

• The speed of the toy car

• The type of car

• The length of the ramp

Tags

NGSS.MS-PS3-1

A researcher is testing how different amounts of sleep affect memory test results. Which variable should be kept constant to ensure a fair test?

• The amount of sleep

• The memory test used

• The memory test results

• The number of participants