unit 9 Flashcards
1
Q
Atmosphere
A
- a mixture of gases that surrounds a planet or moon.
2
Q
Gravity
A
a force of attraction between objects that is due to their masses
3
Q
Accomodations -
A
changes that must be made in an environment to maintain livable conditions for humans
4
Q
Manned-Space Exploration
A
humans on board space craft
5
Q
Pressure -
A
continuous physical force exerted on or against an object by something in contact with it
6
Q
Proximity
A
- closeness
7
Q
Radiant Energy
A
- the energy we get from the sun, includes infrared and ultraviolet energy
8
Q
Temperature
A
measurement of heat
9
Q
Solar System -
A
sun, planets, and all the other objects that revolve around the sun
10
Q
Micro Gravity
A
condition in which people or objects appear to be weightless
11
Q
Habitable zone
A
- range of orbit around a star in which a plant can support liquid water
