1. Have your science book open to page 74 so I may check your reading homework
Thursday 2/23/17
Notebook Entry: A system is something with parts that work together. The atmosphere is a system. What do you thinks its parts are that work together?

2. BIG Question: How does the sun’s energy affect Earth’s atmosphere?
The Atmosphere
BIG Question: How does the sun’s energy affect Earth’s atmosphere?

3. How long will the candle burn? (big jar vs. little jar)
Prediction: What is your prediction? Why do you think that?
Observation
3. What do you think might happen if I put a bigger candle under the jar?
Container Size
Time (sec)
Jar Large (437 ml)
Jar Small (237 ml)

5. Nitrogen (N2)
Importance: adds mass to the atmosphere creating air pressure
nitrogen is usually volatile when in liquid or solid form – will turn to a gas easily
it is unreactive with materials that make up the solid earth 
it is very stable in the presence of solar radiation.

7. Oxygen (O2)
Importance: needed by plants and animals, necessary for fire to burn
What if there was too much? toxic to animals
What if there was too little? earth could not support life

8. Water Vapor (H2O)
Importance: important factor in weather, part of water cycle
What if there was too much?- Earth would get too hot
What if there was too little? – Earth would be too cold

9. Carbon Dioxide (CO2)
Importance: needed by plants, keeps Earth warm enough to live on
What if there was too much?- Earth would be too hot
What if there was too little? – plants would not survive, earth would be too cold

10. Ozone (O3) Importance: blocks harmful UV light from the sun,
What if there was too much? harms plants and animals
What if there was too little? UV light would not be blocked

12. Atmosphere as seen from International Space Station

13. Humans in the Atmosphere