Scientific Method and Variables Review

In an experiment, the factor that we measure is called the

• controlled variable
• conclusion
• independent variable
• dependent variable

A scientist hypothesizes the the temperature at which an alligator's egg is incubated will determine whether the alligator will be male or female. The independent variable is

• the gender of the alligator
• the male alligators
• the temperature
• the incubator

A scientist hypothesizes the the temperature at which an alligator's egg is incubated will determine whether the alligator will be male or female. The dependent variable is

• the incubator
• the temperature
• the size of the baby alligators
• the gender of the baby alligators

A scientist who wants to study the effects of fertilizer on plants sets up an experiment. Plant A gets no fertilizer, Plant B gets 5 mg. of fertilizer each day, and Plant C gets 10mg. of fertilizer each day. Which plant is the control group?

• plant B
• All of them
• Plant C
• Plant A

A scientist conducted an experiment to determine how the amount of salt in a body of water affects the number of plants that can live in the water. In this experiment the independent variable is...

• the temperature of the water
• the water
• the amount of salt in the water
• the number of plants in the water

To make observations you use your _______.

• senses

• feet

• smile

• experience

Performing a test or experiment allows you to test your ___________.

• draw conclusions

• hypothesis

• senses

• battery

All factors that can change in an experiment.

• variable
• data
• conclusion
• result

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4

The outcome of your test.

• variable
• results
• experiment
• question

Tags

NGSS.MS-ETS1-3

NGSS.MS-PS1-2

If you are testing the buoyancy of a cotton ball and you leave one plain, cover one half in oil, and cover the third in oil completely then place each in water, what is the variable?

• water
• cotton ball
• amount of oil
• time