Science: Unit 4 Flashcards
(10 cards)
0
Q
Big Bang Theory
A
All matter and energy exploded from a small volume 13.5 billion years ago and expanded in all directions.
1
Q
Universe
A
All space, matter, and energy that exists. (In the past present and future)
2
Q
Red shift
A
All distant stars and galaxies are moving away from us.
3
Q
Galaxy
A
A collection of stars and matter in space.
4
Q
Where is our solar system?
A
In the Milky Way Galaxy
5
Q
What are the three types of galaxies?
A
Spiral, elliptical, irregular
6
Q
How old is our solar system?
A
4.6 billion years old
7
Q
Planet
A
A body that orbits the sun, is round due to gravity, an has a clear orbital path.
8
Q
Terrestrial planets
A
4 inner planets with solid rocky surfaces
9
Q
Gas giants planets
A
4 outer planets that are much larger, have thick gas atmospheres, and many satellites an rings.
