Greenhouse effect and global warming

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Across
  1. 3. what comes from cattle as they digest their food
  2. 6. - the earth is wrapped in a blanket of air called the
  3. 7. oxide- what is produced when plants die and rot
  4. 9. -what is increasing to effects of global warming
  5. 11. what in the atmosphere stops the heat from expanding into space
  6. 12. Vapour - what occurs naturally in the atmosphere
  7. 13. what is the difference in global temperatures between today and the ice ages
  8. 15. what is being effected by the increase temperature caused by pollutants such as fertilisers being washed by farms
Down
  1. 1. Dioxide- are causing global warming
  2. 2. effect - what is a process by which thermal radiation from a planetary surface
  3. 4. - what type of radiation is absorbed by the atmosphere and re-directed both upwards and downwards
  4. 5. what is characterised by decreasing temperature with height average rate of 3.5 degrees
  5. 8. what is the layer of colourless gas found in the stratosphere
  6. 10. the thermal radiation which is absorbed in the greenhouse gases is called
  7. 11. house gases- what are the chemical compounds found in the earth’s atmosphere
  8. 14. what does life depend on to get its energy