Intro Flashcards
1
Q
Evolution biology means?
A
Study of history of life forms on earth
2
Q
We are peeping into the past when we look at stars?
A
Stellar distances are calculated in light years
3
Q
Age of universe?
A
20 billion years old
4
Q
Stars qnd clouds of gas and dust makes?
A
Galaxies
5
Q
The temperature came down?
A
Universe expanded
6
Q
Earth was formed?
A
4.5 billion years back
7
Q
What covered the surface of the earth
A
Water vapour, methane, carbon dioxide, ammonia from molten mass
8
Q
Oxygen with ammonia nd methane formed?
A
Water and co2
9
Q
How many years after the formation of earth life appeared?
A
500 million ie. 4 billion years back
