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.
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.