Controlled experiments

Experiment: How does the flavor of ice cream affect the speed of melting?

The flavor of ice cream is the ___________ variable.

• independent

• dependent

Tags

NGSS.MS-PS1-4

Experiment: Does changing the wing shape to make it more narrow affect the distance a paper airplane will fly?

The wing shape is the ___________ variable.

• independent

• dependent

Tags

NGSS.MS-PS2-2

Experiment: How does watching TV during studying affect a student’s test grades?

The students grades are the ___________ variable.

• independent
• dependent

Experiment: Do roses grow more in height in partial or direct sunlight?
The growth height is the ____________  variable.

• independent
• dependent

Tags

NGSS.MS-LS1-5

Experiment: How does adding cardio to one’s daily schedule affect their heart rate?
The heart rate is the ________________  variable.

• independent
• dependent

The independent variable is the

• one you measure.
• one you change.

You can have more than one independent variable in a controlled experiment.

• True
• False

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...

• The type of plant
• The amount of sunlight
• The type of music
• The type of liquid

A student performed an experiment that tested how many days it takes different types of grass seed to grow to a height of two inches. Four types of grass seed were tested, and the student recorded the number of days for each type to grow. Use this information to answer the next question.

What are the constants in this experiment?

• amount of sunlight, amount of water, and type of soil

• different types of grass seeds

• growth of the grasses

• height of 2 inches

When conducting a scientific experiment, what is typically the last step?

• communicate the results

• question

• analyze the results

• conclusion