Question

read the experiment and determine the answers to questions #3 - 4: scenario:
miss hogan wanted to know if the amount of oil would affect the height of a cake. she prepared three cakes. each cake was baked at 375°f for 40 minutes. each cake received two eggs and 1/4 cup water. the first cake received 1/2 cup oil (as recommended on the cake box). the second cake received 1/2 cup oil. the third cake received 1 cup of oil. after baking, each cake was observed. the first cake rose three inches. the second cake rose two inches and the third cake one inch. from this observation, miss hogan determined that the amount of oil did affect the height of the cakes.

1. what is the independent variable (iv)?

a. type of cake c. temperature that the cake was baked
b. amount of oil d. height of cake

1. what is the dependent variable (dv)?

a. type of cake c. temperature that the cake was baked
b. amount of oil d. height of cake

1. what is the primary source of crude oil pollution in ocean waters?

a. oil tanker accidents c. offshore drilling operations
b. natural seepage from the ocean floor d. industrial waste discharge

1. which statement about the endangered species act is accurate?

a. it includes every endangered species on earth
b. it is a partial list of endangered species
c. it only includes species in north america
d. it updates automatically when species become endangered

Explanation:

Step1: Identify Independent Variable (IV)

The independent variable is what is changed in an experiment. Here, the amount of oil is changed (½ cup, ¼ cup, 1 cup).

Step2: Identify Dependent Variable (DV)

The dependent variable is what is measured. The height of the cake is measured (3 inches, 2 inches, 1 inch).

Answer:

1. b. Amount of oil
2. d. Height of cake