ACT Science Practice Test 104

Directions: Each passage is followed by several questions. After reading a passage, choose the best answer to each question and fill in the corresponding oval on your answer document. You may refer to the passages as often as necessary.

You are NOT permitted to use a calculator on this test.


PASSAGE V

Some students performed 3 studies to measure the average speed on a flat surface of a gas-powered golf cart. Each study was conducted on a fair day with no wind. A 500-foot long flat surface was measured, and the cart's travel time was measured from start to finish with a stopwatch. The cart was not modified in any way, the same driver was used each time, and the cart's fuel tank was filled before each trial.

Study 1

The students first drove the cart on a smooth asphalt road. One student drove the cart as the other student started the stopwatch. The student stopped the stopwatch as the cart crossed the 500-foot mark. The students calculated the results of three separate trials and averaged the results (see Table 1).

Study 2

The students repeated the procedure used in Study 1, except the cart was driven on the fairway (very short, well-groomed grass). The results are shown in Table 2.

Study 3

The students repeated the procedure used in Study 1, except they drove the cart through the rough (thick, long grass). The results are shown in Table 3.

1. The highest average speeds resulted from using which surface?

A. Fairway
B. Rough
C. Asphalt
D. The speeds remained constant.

2. According to Table 1, the average speed for all three trials is:

F. less than the speed measured in Trial 1.
G. greater than the speed measured in Trial 3.
H. greater than the speed measured in Trial 2.
J. less than the speed measured in Trial 3.

3. According to Tables 1, 2, and 3:

A. the average speed of the cart in the rough is approximately two-thirds of the average speed of the cart on asphalt.
B. the average speed of the cart on the fairway is approximately one-third of the average speed of the cart on asphalt.
C. the average speed of the cart in the rough is approximately two-thirds of the average speed of the cart on the fairway.
D. the average speed of the cart on asphalt is approximately two-thirds of the average speed of the cart in the rough.

4. According to the passage, which of the following was the independent variable in each of the studies?

F. The surface upon which the golf cart was driven.
G. The amount of fuel in the tank of the golf cart.
H. The average speed of the golf cart.
J. The number of trials conducted.

5. During which of the following was the average travel time of the car the slowest?

A. Study 1, Trial 2.
B. Study 2, Trial 2.
C. Study 3, Trial 2.
D. Study 3, Trial 3.