Science

2. what made up most of earths early atmosphere
3. since 1880 the world has heated up by this much (approx in celsius)
4. An example of _____/__ carbon dioxide is coal
8. average carbon footprint in the uk per person (in tonnes)
9. H2O is the chemical formula for...
11. fuel made from the waste or products of living creatures e.g. wood or manure
13. A place where a lot of carbon dioxide was dissolved
15. how water vapour turned into oceans
16. the greenhouse effect triggers...

1. technical name for gases such as carbon dioxide, methane, water vapour, ntirous oxide,etc.
5. Through photosynthesis, plants produced this as waste
6. one of the first living things in the world
7. an energy source that will never run
8. when all cars being sold will be electric
10. during early earth. there were a lot of _________
12. these were made millions of years ago by dead animals, they contain CO2
14. 78% of the atmosphere is made up of this element