SNC1D Science skills

The independent variable is the ONE thing the experimenter _____.

• changes on purpose

• controls or keeps constant

• measures

• determines the amount of

When testing if plants grow best in colored light. What is the independent variable of this statement?

• Plant Growth

• Colored Light

• The type of plant

• The amount of water

A student wants to test the hypothesis of "If salt is added to water then the boiling point of water will decrease." What is the dependent variable?

• amount of salt

• boiling point

• same amount of water

• the temperature of the stove

Something that is changed in an experiment that may affect the outcome

• variable

• dependent

• hypothesis

• observations

What you measure or observe in an experiment.

• constant variable

• controlled variable

• dependent variable

• independent variable

Tags

NGSS.3-5-ETS1-3

All the things that have to stay the same in an experiment (except for the one thing you change).

• observations

• controlled variable

• dependent variable

• independent variable

Justin wants to determine the effect of fertilizer on the growth of grass. What is the independent variable?

• amount of fertilizer

• height of grass

• type of plant

• time

Tags

NGSS.3-5-ETS1-3

Joe wants to determine the effect of pesticides on the size of apples in the orchard. What is the independent variable?

• amount of bugs

• size of apples

• use of pesticides

• number of apples

Tags

NGSS.3-LS3-2

Joe wants to determine the effect of pesticides on the size of apples in the orchard. What is the dependent variable?

• amount of bugs

• size of apples

• use of pesticides

• number of apples

Tags

NGSS.MS-LS1-5

Beth wants to know if increasing her exercise will decrease the time it takes her to run a mile. What is the independent variable?

• distance

• amount of exercise

• time to run a mile

• heart rate