Birth Of The Earth Flashcards Preview

GEO1211: History Of Our Planet > Birth Of The Earth > Flashcards

Flashcards in Birth Of The Earth Deck (11)
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1
Q

How old is the earth

A

13.7 billion years

2
Q

Why is the universe expanding

A

Red shift

3
Q

What were the first two elements

A

Hydrogen and helium

4
Q

What is the process that occurs in the sun that changes hydrogen to helium

A

Nuclear fusion

5
Q

Elements heavier than ___ have a net energy cost in stars making them

A

Iron

6
Q

How are the rest of the elements (anything other than helium, hydrogen, carbon and iron) made

A

Process of neutron capture

7
Q

What must stars create before rocky planets can be formed

A

Heavy elements (mainly metals) - takes approx 2 billion years

8
Q

What is the earths core made of

A

Iron - silicone sits on top

9
Q

Example of a non volatile element

A

Silicon

10
Q

What 2 gases dominated the earths early atmosphere

A

Carbon dioxide and nitrogen

11
Q

Example of an element that makes up a large part of solid earth

A

Silicon