Fuels and Earth Science- earth and the atmospherics Flashcards
1
Q
what formed the earths early atmosphere?
A
gases produced by volcanic activity
2
Q
what was the earths early atmosphere like?
A
- little oxygen
- large amounts of CO2
- water vapour
- small amounts of other gases
3
Q
how did the oceans form?
A
condensation of the water vapour
4
Q
how was the amount of CO2 in the atmosphere decreased?
A
-dissolved into the ocean
5
Q
how did the growth of primitive plants change the amount of oxygen in the atmosphere?
A
- photosynthesised and took in CO2 and released oxygen
- carbon dioxide got trapped in fossil fuels and sedimentary rocks
6
Q
what is the chemical test for oxygen?
A
glowing splint, it will relight
7
Q
what are the greenhouse gases?
A
carbon dioxide
water vapour
methane
8
Q
how does the greenhouse effect work?
A
some infrared radiation is
- reflected back by greenhouse gases
- into spce
- absorbed by green. gases
