Flashcards
Composition of air
Cards in this deck (11)
- 1What are the 5 main gases that make up air?1. Nitrogen
2. Oxygen
3. Argon
4. Carbon dioxide
5. Neon - 2What % is Nitrogen?78%
- 3What % is oxygen?21%
- 4What % is Argon?0.93%
- 5What % is Carbon dioxide?0.039%
- 6What % is Neon?0.0018%
- 7How did the gases get into the atmosphere?This composition began after volcanic eruptions gave off H2O as steam/water vapor, CO2, nitrogen, and ammonia.
- 8How did oxygen get into the atmosphere?After the volcano, the ocean absorbed some CO2 and 'stromatolites' began to photosynthesize, releasing oxygen
- 9Was the composition of air always the same?No. when Earth first formed there was hydrogen sulfide, carbon dioxide, methane and steam - no oxygen
- 10The levels of .... .... and .... have remained relatively the same after the initial changeNitrogen, Oxygen and Argon
- 11How and why is the composition of air changing?Man's activities like burning fossil fuels or deforestation are affecting the balance of gases in the atmosphere
( more carbon-dioxide, depletion of the ozone layer, global warming )
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- 8th Grade Flashcards on Composition of air, created by 17asanjay on 14/05/2013.
- Created by
- 17asanjay · May 2013
- Updated
- Apr 6, 2018
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