Earth's Atmosphere- Unit 8 Flashcards
How has the Earth’s atmosphere changed from when it was first formed?
Less CO2
More Oxygen
More Nitrogen
3 processes that release carbon dioxide
Burning fossil fuels
decaying matter
respiration of farm life
Deforestation
3 processes that take in carbon dioxide
Dissolve in ocean
Locked up in sedimentry rock
locked up in fossil fuels
locked up in plants
How did the Earth’s atmosphere form?
Gases released
Through volcanic activity
How did the Oceans from?
Condensation of water vapour in the atmosphere
when earth cooled
Problem of CO2
green house gas
causes global warming
Problem of SO2
Dissolves in clouds
Causes acid rain
Problem of CO
Silent killer
toxic
Problem of particulate (soot)
Global dimming
What is carbon neutral
CO2 absorbed by plants
same amount is released when burnt
no net change in CO2 in the atmosphere
Why did the CO2 decrease?
Lock up
In plants (photosynthesis)
In the ocean (carbonates)
How do carbonates form?
CO2 dissolved in ocean
forming metal carbonate
Word equation for combustion
hydrocarbon + oxygen –> water + carbon dioxide
Test for CO2
Limewater
Turns clear to cloudy
due to white precipitate formed
Test for water
anhydrous copper sulphate
turns white to blue
