# Independent vs Dependent Variables (9-1-22)

## Quiz by Melissa Law

Science
Next Generation Science Standards

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11 questions
• Q1

A student hypothesizes that green algae will grow fastest when exposed to blue light. To test this hypothesis, the student should design an experiment with which independent variable (IV)?

amount of light per day

color of light

color of algae

45s
• Q2

Sandy is conducting an investigation to find out which food her dog likes best. Which is the dependent variable (DV) in her investigation?

type of food given

color of the dog dishes

amount of food consumed

30s
• Q3

In an experiment, Jackson tested to see how the size of rocks affects the amount of dirt that washes away when water flows downhill. Which variable is the independent variable (IV)?

amount of water

size of the rocks

type of dirt

30s
• Q4

You design an experiment to test the affect of temperature on bacteria growth. You use three bacteria cultures under three heat lamps at different temperatures. What is the dependent variable (DV) in this experiment?

bacteria growth

temperature

length of experiment

30s
• Q5

A medical researcher hypothesizes that a new medication can reduce high blood pressure. Which of these would most likely be the dependent variable (DV) in a study involving this medication?

the number in the group

blood pressure of the group

the ages of the group

30s
• Q6

In an experiment about growth, some snapdragons seeds were placed in a dish lined with moist paper towels at different temperatures. Which of these is the independent variable in the experiment?

number of sprouts

the temperature

type of seeds

30s
• Q7

Does the amount of salt change the ability of an object to float or sink? Amount of salt is the...

independent variable (test variable)

dependent variable (outcome variable)

30s
• Q8

How does the incline of a board affect how far a ball will roll? Distance the ball rolls is the...

dependent variable (outcome variable)

independent variable (test variable)

30s
• Q9

Does playing classical music improve memory? Playing classical music is the...

independent variable (test variable)

dependent variable (outcome variable)

30s
• Q10

What is true of an independent variable (IV).

it is what you measure

it is outcome variable

it is the test variable

it is not controlled by the person performing the experiment

30s
• Q11

What is true about a dependent variable (DV).

it is the test variable

it is the outcome variable

it is controlled by the person preforming the experiment

it is what you change (manipulate) on purpose

30s

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