1. The discovery of non-light emitting celestial bodies were found mainly through computers and

the Hubble telescope
the International Space Station
the optical telescope
the radio telescope

2. What is one way space technology is different than space exploration?

Technology makes use of what scientists discover in space.
Technology is concerned with theories only.
Technology is about the history of space.
Technology is used only in earth exploration.

3. We can retrieve data from objects in outer space. Which of the following would be almost impossible to learn?

the highest and lowest temperature on Venus.
how long it takes the planets to move around the Sun.
how many stars there are in our Galaxy.
the time it takes for light to travel from the Sun to Earth.

4. What is an important function of space probes, such as Voyager, as they travel in space?

To land on each planet and report the conditions there
To take pictures and send them back to Earth
To analyze what each planet is made of
To see if life exists on other planets

5. Compare the gravity on the Earth and the moon to determine which statement is correct.

The moon orbits the Earth because they have an equal gravitational pull on each other
The moon and Earth do not collide because the gravitational force of each pushes them apart
The gravity of the Earth and the moon pulls them together, but Earth's gravity is greater because it has more mass
The Earth and moon do not collide because the Earth has greater mass and, therefore, greater gravity than the moon and pushes it away

6. What do objects that have more mass also have more of?

volume
size
gravity
speed

7. Without gravity, what would be the shape of the solar system?

Planets would revolve in perfect circles.
It would be much different from what it is now.
Planets' orbits would cross.
All planets would be in the same orbit.