Question

Who ever answers this will get brainliest and lots of point please help here it is: 1. A study was done to find if different tire treads affect the braking distance of a
car.

I: __________________ D:__________________ C:__________________

2. The time it takes to run a mile depends on the person’s running speed.

I: __________________ D:__________________ C:__________________

3. The height of bean plants depends on the amount of water they receive.

I: __________________ D:__________________ C:__________________

4. The higher the temperature of the air in the oven, the faster a cake will bake.

I: __________________ D:__________________ C:__________________

5. Lemon trees receiving the most water produced the most lemons.

I: __________________ D:__________________ C:__________________

6. An investigation found that more bushels of potatoes were produced when the

soil was fertilized more.

I: __________________ D:__________________ C:__________________

7. Students measured the temperatures of the water at different depths in Lake

Skywalker and found that the temperature varied.

I: __________________ D:__________________ C:__________________

8. The amount of pollution produced by cars was measured for cars using gasoline

containing different amounts of lead.

I: __________________ D:__________________ C:__________________

9. Four groups of rats are first massed and then fed identical diets except for the

amount of vitamin A they receive. Each group gets a different amount. After 3

weeks on the diet, the rats’ masses are measured again to see if there has been

a decrease.

I: __________________ D:__________________ C:_

Answer 1

Answer:

1.

I: Type of tire tread

D: Breaking Distance

C: Model of car, material of road

2.

I: Person’s running speed

D: Time to run one mile

C: Distance of run (one mile)

3.

I: Amount of water

D: Height of bean plants

C: Soil type, amount of sunshine

4.

I: Temperature of oven

D: Time it takes for cake to bake

C: Batter, baking tin

5.

I: Amount of water

D: Amount of lemons

C: Soil type, environment, nutrients

6.

I: Amount of fertilizer

D: Amount of potatoes

C: Soil type, environment, amount of water

7:

I: Depth of lake

D: Temperature

C: Time of day, day of year

8.

I: Amount of lead in gasoline

D: Amount of pollution emitted

C: Amount driven by each car

9.

I: Amount of Vitamin A

D: Difference in weight

C: Other nutrients in diet, time elapsed between measurements

Explanation:

The independent variable is the thing in the experiment that the researcher changed. The dependent variable is the thing in the experiment that changes as a result of differences between the independent variable.

The controls are things that do no change between all variations of the experiment.