Experimental Variables

I want to test how the amount of water you give a plant affects its growth. IV = ?

• How tall it is at the start

• The type of soil you planted it in

• How much water you give it

• How tall it is after 2 weeks

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

I want to see whether the type of soda matters when I add Mentos to make bubbles. IV =

• Temperature of soda

• Number of mentos added

• Type of soda

• How many bubbles

Tags

NGSS.MS-PS1-2

I want to test how the launching pressure affects the distance of a marker rocket. IV = ?

• Launch Angle

• Distance the rocket flies

• Time the rocket is in the air

• Launch Pressure

Tags

NGSS.MS-PS2-2

I want to test how the amount of water you give a plant affects its growth. DV = ?

• How tall it is at the start

• The type of soil you planted it in

• How much water you give it

• How tall it is after 2 weeks

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Maya designed an experiment to answer the following question: How does the amount of water given to a lima bean seed affect how tall it grows? In this experiment, what variable should Maya CHANGE?

• the amount of water

• the kind of plant

• the type of soil

• the amount of sunlight it gets

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

If we increase the length of string on a pendulum, then it will a take longer time period to make one complete cycle back and forth. What is the independent variable in this investigation?

• Time period

• Number of cycles

• Length of string

• Amount of mass on end of string

A student is testing the effect of different amounts of mass on the flight length of one specific paper airplane design.

What is the independent variable in this investigation?

• Flight length

• Airplane design

• Amount of mass

• Force of throw

Tags

NGSS.MS-PS2-2

If pine tree seedlings have a biodegradable root container, then they will grow faster than seedlings with bare roots. What is the independent variable in this investigation?

• Amount of fertilizer used

• Amount of water

• Tree growth

• Root treatment

Tags

NGSS.MS-LS1-5

The type of variable that you change or manipulate in an experiment.  It is what you are testing.

• Independent

• Dependent

• Control

The type of variable that responds to the experiment and is what you measure to determine if your hypothesis is true.

• Independent

• Dependent

• Control