Atmosphere Flashcards
Nitrogen
78%
Oxygen
21%
Other gases
0.965%
Carbon dioxide
0.035%
What gases was the earths early atmosphere made from?
The gases were made from Nitrogen,oxygen,carbon dioxide and other gases
Where did most of the gases come from that made up earths early atmosphere?
Volcanoes
How did oceans form?
The water vapour from volcanoes cooled and condensed to form an ocean
How are levels of carbon dioxide reduced in the atmosphere.
Photosynthesis.Take in carbon dioxide
Development of the earths atmosphere
The earth was formed 4.5 billion years ago
Volcanoes released large amounts of carbon dioxide water vapour and small amounts of other gases including ammonia methane and nitrogen
The water vapour eventually cooled and condensed and made rain.
Carbon dioxide was dissolved into oceans.Reducing the amount of CO2
In the atmosphere
After the first billion years life began and CO2 was converted into oxygen.
Oxygen levels started to rise and plant started to decrease the levels of carbon dioxide.
Humans evolved
Greenhouse gases
Carbon dioxide, Methane, water vapour
Greenhouse effect
The greenhouse effect is the process through which heat is trapped near Earth’s surface by substances known as ‘greenhouse gases.’ Imagine these gases as a cozy blanket enveloping our planet, helping to maintain a warmer temperature than it would have otherwise.
How has human activity caused an increase in CO2 levels?
Burning fossil fuels,changing land use,using limestone to make concrete and expansion of farming
Order of earth structure
Crust
Mantle
Outer core
Inner core
Crust
Thin layer of rock at the surface of the earth
Mantle
The mantle extends outwards from the core.It is a semi molten liquid upon which the earths crust floats
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