1. Spaceships orbit the Earth in a circular motion.

True
False

2. Liquid-cooling water in spacesuit garments is used to regulate heat and keep astronauts comfortable in the extreme temperatures of space.

True
False

3. A small number of people are needed to fly a space mission.

True
False

4. Solar flares cannot change the direction of a spacecraft.

True
False

5. Telescopes allow astronomers to make new discoveries which result in the need for even more sophisticated telescopes.

True
False

6. Very little energy is used during a rocket launch.

True
False

7. Special tiles help dissipate (break up) the heat of a space shuttle upon re-entry into the Earth's atmosphere.

True
False

8. What is the force that holds objects (like a spacecraft) to the Earth's surface?

Vacuum
Acceleration
Mass
Gravity

9. Which of the following best describes the motion of an orbiting spacecraft?

Straight line
Circular
Zigzag
None of the above

10. Which of the following is a description of the two forces acting on an orbiting spacecraft?

They are balanced.
They do not act on the spacecraft.
They reinforce one another.
None of the above.

Your score is out of 10.