B2 Vocabulary

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Across
  1. 3. a collision of particles that causes them to change their direction
  2. 6. oil, natural gas, coal, nuclear energy
  3. 8. water, solar energy, wind, plants
  4. 9. energy incident on a system=the systems natural frequency
  5. 11. =power radiated per unit area/σT^4
  6. 12. mechanism where some of the incoming radiation from the Sun is trapped within the Earth surface–atmosphere, which increasing the overall temperature of the system
  7. 14. the human impact on the Earth's environment
Down
  1. 1. human activity that causes the atmosphere to absorb more thermal radiation in the Earth's surface
  2. 2. I1/(I2)=(d2)^2/(d1)^2
  3. 4. the fraction of light a surface reflects
  4. 5. What gets trapped in the atmosphere that raises temperatures
  5. 7. a diagram used to depict a flow from one set of values to another
  6. 10. 1.361 kilowatts per square meter
  7. 13. energy ____ on the system is known as albedo, particles or radiation that falls on a surface