Dependent and Independent variables

A scientist conducts a study to determine whether how long a student sleeps affects test scores. Test scores is the

• independent variable

• dependent variable

Tags

NGSS.MS-LS1-5

A cow is given a growth hormone and then compared to another cow that was not given a growth hormone. Both cows were weighed at 2 years. What is the independent variable?

• the cows

• the growth hormone

• the weight of the cow

Tags

NGSS.MS-LS1-5

You want to compare brands of paper towels, to see which holds the most liquid. The independent variable is

• the brand of toilet paper

• the amount of liquid absorbed by the toilet paper

Tags

NGSS.MS-ETS1-3

A scientist conducts an experiment to see whether caffeine affects appetite. The dependent variable is

• the amount of caffeine

• appetite

Mosquito repellent is sprayed on on arm and the other arm is not sprayed. The number of mosquito bites is counted after 2 hours.

• The dependent variable is the arm

• The dependent variable is the mosquito repellent

• The dependent variable is the number of mosquito bites

• The dependent variable is the number of hours

One grape is placed in tap water and another grape is placed in salt water. The change in their mass is measured after a day.

• The independent variable is the grape

• The independent variable is the type of water

• The independent variable is the change in the mass of the grape

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-3

Two different cars are traveling at 60 mph. At a certain point, both cars slam on the brakes. The distance it takes for each car to stop is then measured. The dependent variable is

• the braking distance

• the type of car

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Two plants are grown using the same light and pots. On plant is given water that has been microwaved and the other plant is given regular tap water. Their height is measured after 2 weeks.

• The dependent variable is the number of weeks

• The dependent variable is the height of the plant

• The dependent variable is the type of pot

• The dependent variable is the type of water

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

A scientist working of an oven company wanted to test if the temperature of the air in the oven affects the time that it takes for a cake to bake.

• The independent variable the the air temperature

• The independent variable is the oven

• The independent variable is the time taken for the cake to bake

Tags

NGSS.MS-ETS1-1

Two groups of students were tested to compare their speed in working out math problems. Each group were given the same problems. One group used calculators while the other group did not. The independent variable is

• the type of problems given

• the speed with which they worked out the problems

• the use of calculators