Which of the following hypotheses is written correctly?

•  If a tennis ball is frozen, it won't bounce as high as one that is not frozen.

• If I heat up a tennis ball it will bounce high.

•  If I freeze a tennis ball, then it will not bounce as high.

• Frozen tennis balls will not bounce as high.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

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

• controlled variable

• conclusion

• independent variable

• dependent variable

Tags

NGSS.MS-PS2-2

A scientist hypothesizes 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

Tags

NGSS.MS-LS1-5

A scientist hypothesizes 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 baby alligators

• the gender of baby alligators

Tags

NGSS.MS-LS1-5

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 (normal) group?

• Plant B

• All of them

• Plant C

• Plant A

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

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

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

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

• draw conclusions

• hypothesis

• senses

• battery

Tags

NGSS.MS-PS1-2

The factors that can change in an experiment are called

• variables

• hypothesis

• conclusion

• metric rulers

Tags

NGSS.MS-PS2-2

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 independent variable?

• water

• cotton ball

• amount of oil

• time

If you conduct an experiment where you place 5 of the same red candies in different types of soda, all in the same amount of liquid, what is the independent variable? 

• type of cup

• color of candy

• kind of soda

• amount of soda