1. Science Warm-Up
Look at the plastic bottle is there anything in it? How do you know? Pg 2

2. An Ocean of Air

3. Explore on your own
See if you can come up with evidence that air is real. Please complete Is Air There? Activity

4. How Is Air Like an Ocean?
Air and water move around without breaking apart, because they are fluids.
Air isn't a liquid, it's a gas, another kind of fluid.

5. What Makes Up Air?
Air is made of molecules of different types of gases
The two most common
Nitrogen or N2 (78%)
Oxygen or O2 (21%)
Other trace gases (1% together)
Argon
Carbon Dioxide
Neon
Helium
Methane
Krypton
Hydrogen
Water vapor
Particles

6. Particles
Smoke
Dust

7. Does the percentages of gases in the atmosphere change?
Explain your answer

8. Atmosphere We all live in the ocean of air, called the atmosphere.
A layer of gases that surround our planet

9. How much air?
If you were to compare the Earth to an ordinary apple, the atmosphere would be only as thick as the apple's skin.
Our atmosphere is only about 500 miles thick
With the majority of the gases being found down in the lowest layer of the atmosphere

10. Functions of the Atmosphere
Holds oxygen
Holds carbon dioxide
Holds nitrogen
Regulates temperature
Protects from UV radiation
Protects from small meteors
Necessary for generating sound
Necessary for movement of flying animals and aircraft

11. Homework Have you defined the hot vocab terms
Did you draw a picture of each term