Atmosphere

Today we've been looking at how Earth's atmosphere has changed over time. Answer these questions to finish off what we were looking at during period 3:

1. What was earth's early atmosphere mostly made from? Which organisms increased the amount of oxygen?
2. What are the raw materials needed to produce calcium carbonate?
3. Briefly explain the process that makes limestone:
4. What gas makes up most of the Earth's atmosphere today?
5. Complete the following activity. How long had the Earth's atmosphere been stable before the recent changes?
6. Looking at the carbon cycle below, identify the process which is leading to increasing amounts of carbon dioxide in the atmosphere recently:
7. Explain what happens during the fractional distillation of air. What are ethe products used for?
8. Explain how this increase is changing three other things about our planet:
9. What is a carbon dioxide sink?
10. How are plants carbon sinks and soucres?
11. How much carbon dioxide are you producing each year? how could you decrease this?
12. Extension: Briefly explain how the amount of carbon dioxide in the atmosphere has changed since Earth was created until today (you'll need to use more than one website for this so I haven't given links - find them yourself!)