Name:    Practice Quiz: Chapter 14

Multiple Choice
Identify the choice that best completes the statement or answers the question.

1.

The orbital speed for a satellite orbiting very close to Earth's surface is _____.
 a. 1600 m/s b. 4900 m/s c. 8000 m/s d. 16,000 m/s e. 80,000 m/s

2.

The reason satellites orbit Earth at least 150 km above the surface is to _____.
 a. be above Earth's gravity b. make sure they are higher than the highest mountains c. be above Earth's atmosphere d. keep them out of the way of commercial airliners. e. all of the above

3.

The speed of a satellite in a circular orbit is _____.
 a. constant b. not constant c. constantly increasing

4.

The speed of a satellite in an elliptical orbit is _____.
 a. independent of the height of the satellite b. not constant c. constant

5.

A period of a satellite is defined as _____.
 a. the time for a satellite to cross the United States b. 1 second c. the time for a satellite to make one complete revolution around Earth d. 90 seconds e. 24 hours

6.

The higher a satellite is, the _____.
 a. less its speed is b. greater its speed is c. longer its period is d. both A and C e. both B and C

7.

The fastest moving planet in a solar system is _____.
 a. the most massive planet b. any planet (they all move at the same speed) c. the smallest planet d. the planet nearest the sun

8.

An object is placed exactly halfway between Earth and the moon. The object will fall toward _____.
 a. the moon b. Earth c. neither Earth nor the moon

9.

Compared to the period of a satellite in orbit close to Earth, the period of a satellite in orbit far from Earth is _____.
 a. the same b. longer c. shorter d. Not enough information

10.

Where does a satellite in an elliptical orbit have the greatest kinetic energy?
 a. At the point closest to the planet b. Exactly at the point halfway to the planet c. At the point farthest from the planet d. Anywhere -- its kinetic energy is constant e. More information is needed

11.

Where does a satellite in a circular orbit have the greatest kinetic energy?
 a. At the point farthest from the planet b. Exactly at the point halfway to the planet c. At the point closest to the planet d. Anywhere—its kinetic energy is constant e. More information is needed

12.

What remains constant for a satellite in an elliptical orbit?
 a. Its speed b. Its potential energy c. Its total energy d. Its kinetic energy e. Its distance from the planet

13.

Minimal orbital speed about Earth is approximately 8 km/s. Minimal orbital speed about the moon would be _____.
 a. less than 8 km/s b. about 8 km/s c. more than 8 km/s

14.

As a satellite is moving in orbit around the Earth, the sum of the kinetic energy and potential energy everywhere is _______ .
 a. decreasing. c. constant. b. increasing. d. zero.

15.

Which of the following describes how circular and elliptical satellite orbits vary?
 a. In a circular orbit, both the distance to Earth and the speed of the satellite vary. In an elliptical orbit, neither the distance to Earth nor the speed of the satellite vary. b. In a circular orbit, neither the distance to Earth nor the speed of the satellite vary. In an elliptical orbit, both the distance to Earth and the speed of the satellite vary. c. In both a circular orbit and an elliptical orbit, both the distance to Earth and the speed of the satellite vary. d. In both a circular orbit and an elliptical orbit, neither the distance to Earth nor the speed of the satellite vary.