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6. Roughly what percentage of incoming solar radiation is absorbed by the Earths surface?
7. The infrared radiation that is emitted by the Earths surface is partly absorbed by what in the atmosphere?
8. Carbon Dioxide concentration is increased by human activities in what way?
- Deforestation
- The photochemical breakdown of NO2
- Landfill sites
- Aerosol propellants
9. Which ocean current changes causes a nutrient upwelling which causes algal blooms?
- El Nino
- La Nina
- The North Atlantic Conveyer
10. A positive feedback mechanism is.......
- A situation where an initial change causes a reaction that increases the original change
- A situation where an initial change causes a reaction that reduces the original change