Question

1.) Which of these studies is most likely performed by remote observation?

A
a study of Earth's oceans by scientists on a research boat

B
a study of the effects of weightlessness on humans in a space station

C
a study of a planet that orbits a star other than the sun

D
a study of the composition of rocks returned from the moon by astronauts

2.) A space shuttle is a reusable spacecraft that launches with the aid of rocket boosters and liquid fuel.

A
True

B
False

3.) Scientists use spacecraft to study a variety of objects in space. What benefits do unmanned spacecraft provide to space scientists?

A
Instruments can replace analysis by human scientists.

B
Instruments require more control over the environment than human space flight does.

C
Instruments can be sent places humans cannot go.

D
Instruments never commit errors.

Answer 1

1. is C. because the furthest humans have traveled in space is to the moon.

2. is true, as long as the spacecraft has some repairs, because the heat will cause some damage to the exterior.
3. is C. because unmanned spacecraft have successfully landed on mars, while manned spacecraft have only made it to the moon, so far.