1. Powers of Ten
--Air
What is in Air???

2. What is in this bottle? Is it empty? (nothing in the bottle?) OR
Is it full?
(full of air?)

3. Zoom into a Cloud
Large Scale

4. From large to macro
telescope
103m
eyes

5. Inside macroscopic
eyes
100m
optical magnifier

6. water (rain) droplets
5mm
Macro Scale

7. cloud droplets
Macro Scale

8. From macro to micro
optical magnifier
optical microscope

9. Single cloud droplet
Micro Scale

10. From micro to atomic
optical microscope
Atomic force microscope

11. molecules
20nm

12. Molecules: Bonded Atoms
Oxygen O2
Water H2O
Need to change molecular illustrations to standard format
Carbon dioxide CO2
Nitrogen N2

13. Why are atoms so important?

14. Three Facts about Atoms
Atoms last forever (except in nuclear changes).
Atoms make up the mass of all materials.
Atoms are bonded to other atoms in molecules.

15. Atoms and Molecules in Air
Oxygen molecules (O2) are made of 2 oxygen atoms
Nitrogen molecules (N2) are made of 2 nitrogen atoms
Water molecules (H2O) are made of 2 hydrogen and 1 oxygen atom
Carbon dioxide molecules (CO2) are made of 1 carbon and 2 oxygen atoms

16. How do the three facts about atoms apply to air?
Atoms last forever (except in nuclear changes).
Will the carbon atoms in CO2 still be carbon atoms in a million years?
Will the CO2 molecules still be CO2 molecules in a million years?
Atoms make up the mass of all materials.
Does air have mass?
Atoms are bonded to other atoms in molecules.
What are some important atoms in air?
What are some important molecules in air?

17. Movement of Air Molecules

18. What is in our atmosphere’s air?
Lavoisier，Antoine-Laurent （1743～1794）