Controlled

The variables you keep the same in the experiment are called

• independent variables

• dependent variables

• controlled variables

• hypothesis

Tags

NGSS.MS-PS2-2

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 should be held constant in this experiment?

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

• amount of sunlight

• amount of water and type of soil

• amount of water

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

In a controlled experiment . . .

• all variables are constant except the one you are testing

• more than one variable can be tested at a time

• data is not collected

• the hypothesis is always supported

If you are testing how fertilizer affects plant growth . . .

• the plants can be different species

• the plants should be exactly the same (size, health, age)

• you have to start with seeds instead of plants

• you can't test this

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

The parts of the experiment that remains the same.

• controlled variables

• data

• independent variables

• dependent variables

Tags

NGSS.MS-PS1-2

A factor or condition that is kept the same is called the ______.

• independent variable

• controlled variable

• dependent variable

• constant variable

Tags

NGSS.MS-PS2-2

What is being kept constant?

• ramp height

• speed of the ball rolling

• type of ball

Tags

NGSS.MS-PS2-2

A scientist is testing which flavor of ice cream melts the fastest. What would his controlled variables be? (choose ALL that apply)

• The flavor of ice cream

• the kind of cone the ice creams are in

• the place in the room where the ice cream is

• the size of the scoop

• the time it takes to melt

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

In a controlled experiment, how many variables at one time can you change?

• 1

• 2

• 3

• as many as you want

Tags

NGSS.MS-PS2-2

What is the control group in this experiment?

• The group with the red light

• The group with the white light

• The group with the blue light

• The group with the green light

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-6

NGSS.MS-LS2-3