Space and Time Flashcards
1
Q
What is most abundant in the universe?
A
hydron because it has one proton
- then helium
2
Q
Why is there so much iron on Earth?
A
it decays to iron
3
Q
How are stars formed?
A
nebulae
- cloud of gas and dust
*hydrogen
4
Q
Why does the gas blow away from a shinning star?
A
light exerts a pressure (U/C)
5
Q
what is u/c?
A
intensity of light/ speed of light (small)
6
Q
what is a star positive feedback?
A
more mass over a concentrated area more mass attracted
7
Q
How does a black hole occur?
A
so much mass, strong gravity, no light can escape
8
Q
what is the main sequence of stars?
A
in between super giants and white giants
*long-lived
9
Q
how long do giants last? why?
A
- short time
- inside pressure causes nuclear reactions to happen so fast it blows up as a super nova
10
Q
What does star evolution rely on?
A
mass (gravity)
11
Q
What is a supernova remnant? What does it do to its surroundings?
A
- explosion
- surroundings affected
- leaves gas cloud behind that forms more stars
12
Q
A
