Independent and Dependent Variables

Suzie Q wants to know how different colors of light effect the growth of plants. She believes that plants can survive the best in white light. She buys 5 ferns of the same species, which are all approximately the same age and height. She places one in white light, one in blue light, one in green light, one in red light and one in the closet. All of the ferns are planted in Miracle-Grow and given 20 mL of water once a day for 2 weeks. After the two weeks, Suzie observes the plants and measurements.

What is the independent variable?

• Color of light

• Height of plant

• The plant in the closet

• Amount of water

Tags

CCSS.HSS.ID.A.2

Smithers thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given the special juice to drink while they work. Group B is not given the special juice. After an hour, Smithers counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks

What is the dependent variable?

• Group that didn’t drink the juice

• Productivity of workers

• Smither’s special Juice

• How many snacks

Homer notices that his shower is covered in a strange green slime. His friend Barney tells him that coconut juice will get rid of the green slime. Homer decides to check this out by spraying half of the shower with coconut juice. He sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the appearance of the green slime on either side of the shower.

Amount of green slime is?

• Control group

• Independent variable

• dependent variable

• alot of slime

A dependent variable is the

• A variable that doesn't depend on another variable

• represents the x axis

• variable that depends on another

• a type of control group

Tags

CCSS.6.EE.C.9

A botanist wants to see how different colored light waves influence the growth of pea plants. She puts the same number of seeds into three identical pots with the same kind and amount of soil. She then gives them the same amount of water every three days for the length of the experiment. One pot is placed into a dark windowless closet. Another pot is left on the windowsill, and the third is placed under a lamp with a green bulb. She records the height of each plant every day for three months.

What is the independent variable in this experiment?

• the amount of soil in the pots t

• the color of the light given to the plants

• the amount of water given to the plants

• the amount of time the experiment was conducted

independent variable

• has to have a independent variable

• 7x = 23

• has to have a dependent variable

• represents the x axis

Tags

CCSS.6.EE.C.9

If carrots are eaten daily, then there will be an improvement in vision. Based on this hypothesis, what is the independent variable?

• improvement in vision

• carrots eaten

• people wearing glasses

• preparation of carrots

In an investigation you put a beaker of water in the sun and measure the temperature every 10 minutes for 1 hour.

What is the dependent variable?

• 10 minutes every hour

• how much water

• Temperature

• 9/x=3

Tags

CCSS.6.EE.C.9

A student studies three types of bread. He measures the time it takes to grow mold.

What is the Independent Variable?

• Time it takes to grow mold

• Type of bread

• Type of mold

• How long it sits out

Tags

CCSS.HSF-LE.A.1B

The masses of the rats were measured after they were fed different types of cheese.

What is the dependent variable?

• masses of rats

• type of cheese

• how much they were feed

• how long until measured

Tags

CCSS.6.EE.C.9