Birth Of The Earth Flashcards
How old is the earth
13.7 billion years
Why is the universe expanding
Red shift
What were the first two elements
Hydrogen and helium
What is the process that occurs in the sun that changes hydrogen to helium
Nuclear fusion
Elements heavier than ___ have a net energy cost in stars making them
Iron
How are the rest of the elements (anything other than helium, hydrogen, carbon and iron) made
Process of neutron capture
What must stars create before rocky planets can be formed
Heavy elements (mainly metals) - takes approx 2 billion years
What is the earths core made of
Iron - silicone sits on top
Example of a non volatile element
Silicon
What 2 gases dominated the earths early atmosphere
Carbon dioxide and nitrogen
Example of an element that makes up a large part of solid earth
Silicon
