1. Comparing and Contrasting Air Sea Level vs. The Top of a Mountain

2. Sea-LevelTop of a Mountain Altitude Density (WHY?) Percentage of Nitrogen and Oxygen Ability to Breathe (WHY?) Temperature (WHY?) Air Pressure (WHY?)

3. Sea-LevelTop of a Mountain AltitudeLower Density (WHY?) Percentage of Nitrogen and Oxygen Ability to Breathe (WHY?) Temperature (WHY?) Air Pressure (WHY?)

4. Sea-LevelTop of a Mountain AltitudeLowerHigher Density (WHY?) Percentage of Nitrogen and Oxygen Ability to Breathe (WHY?) Temperature (WHY?) Air Pressure (WHY?)

5. Sea-LevelTop of a Mountain AltitudeLowerHigher Density (WHY?) More dense (more molecules per given space) because gravity is pulling the molecules to the lowest point Percentage of Nitrogen and Oxygen Ability to Breathe (WHY?) Temperature (WHY?) Air Pressure (WHY?)

6. Sea-LevelTop of a Mountain AltitudeLowerHigher Density (WHY?) More dense (more molecules per given space) because gravity is pulling the molecules to the lowest point Less dense (fewer molecules per given space) because gravity is pulling the molecules to the lower point Percentage of Nitrogen and Oxygen Ability to Breathe (WHY?) Temperature (WHY?) Air Pressure (WHY?)

7. Sea-LevelTop of a Mountain AltitudeLowerHigher Density (WHY?) More dense (more molecules per given space) because gravity is pulling the molecules to the lowest point Less dense (fewer molecules per given space) because gravity is pulling the molecules to the lower point Percentage of Nitrogen and Oxygen Nitrogen- 78% Oxygen- 21% Ability to Breathe (WHY?) Temperature (WHY?) Air Pressure (WHY?)

8. Sea-LevelTop of a Mountain AltitudeLowerHigher Density (WHY?) More dense (more molecules per given space) because gravity is pulling the molecules to the lowest point Less dense (fewer molecules per given space) because gravity is pulling the molecules to the lower point Percentage of Nitrogen and Oxygen Nitrogen- 78% Oxygen- 21% Nitrogen- 78% Oxygen- 21% Ability to Breathe (WHY?) Temperature (WHY?) Air Pressure (WHY?)

9. Sea-LevelTop of a Mountain AltitudeLowerHigher Density (WHY?) More dense (more molecules per given space) because gravity is pulling the molecules to the lowest point Less dense (fewer molecules per given space) because gravity is pulling the molecules to the lower point Percentage of Nitrogen and Oxygen Nitrogen- 78% Oxygen- 21% Nitrogen- 78% Oxygen- 21% Ability to Breathe (WHY?) Easier- There are more molecules at sea-level, so you breathe in more oxygen per breath Temperature (WHY?) Air Pressure (WHY?)

10. Sea-LevelTop of a Mountain AltitudeLowerHigher Density (WHY?) More dense (more molecules per given space) because gravity is pulling the molecules to the lowest point Less dense (fewer molecules per given space) because gravity is pulling the molecules to the lower point Percentage of Nitrogen and Oxygen Nitrogen- 78% Oxygen- 21% Nitrogen- 78% Oxygen- 21% Ability to Breathe (WHY?) Easier- There are more molecules at sea-level, so you breathe in more oxygen per breath More difficult- There are fewer molecules on the mountain-top, so you have to breathe in more to get enough oxygen Temperature (WHY?) Air Pressure (WHY?)

11. Sea-LevelTop of a Mountain AltitudeLowerHigher Density (WHY?) More dense (more molecules per given space) because gravity is pulling the molecules to the lowest point Less dense (fewer molecules per given space) because gravity is pulling the molecules to the lower point Percentage of Nitrogen and Oxygen Nitrogen- 78% Oxygen- 21% Nitrogen- 78% Oxygen- 21% Ability to Breathe (WHY?) Easier- There are more molecules at sea-level, so you breathe in more oxygen per breath More difficult- There are fewer molecules on the mountain-top, so you have to breathe in more to get enough oxygen Temperature (WHY?) Warmer- Since the air is more dense, there are more molecules to hold the heat Air Pressure (WHY?)

12. Sea-LevelTop of a Mountain AltitudeLowerHigher Density (WHY?) More dense (more molecules per given space) because gravity is pulling the molecules to the lowest point Less dense (fewer molecules per given space) because gravity is pulling the molecules to the lower point Percentage of Nitrogen and Oxygen Nitrogen- 78% Oxygen- 21% Nitrogen- 78% Oxygen- 21% Ability to Breathe (WHY?) Easier- There are more molecules at sea-level, so you breathe in more oxygen per breath More difficult- There are fewer molecules on the mountain-top, so you have to breathe in more to get enough oxygen Temperature (WHY?) Warmer- Since the air is more dense, there are more molecules to hold the heat Cooler- Since the air is less dense, there are fewer molecules to hold the heat Air Pressure (WHY?)

13. Sea-LevelTop of a Mountain AltitudeLowerHigher Density (WHY?) More dense (more molecules per given space) because gravity is pulling the molecules to the lowest point Less dense (fewer molecules per given space) because gravity is pulling the molecules to the lower point Percentage of Nitrogen and Oxygen Nitrogen- 78% Oxygen- 21% Nitrogen- 78% Oxygen- 21% Ability to Breathe (WHY?) Easier- There are more molecules at sea-level, so you breathe in more oxygen per breath More difficult- There are fewer molecules on the mountain-top, so you have to breathe in more to get enough oxygen Temperature (WHY?) Warmer- Since the air is more dense, there are more molecules to hold the heat Cooler- Since the air is less dense, there are fewer molecules to hold the heat Air Pressure (WHY?)Higher- There is a “larger column of air” pushing down, which means there are more molecules pushing down creating more force

14. Sea-LevelTop of a Mountain AltitudeLowerHigher Density (WHY?) More dense (more molecules per given space) because gravity is pulling the molecules to the lowest point Less dense (fewer molecules per given space) because gravity is pulling the molecules to the lower point Percentage of Nitrogen and Oxygen Nitrogen- 78% Oxygen- 21% Nitrogen- 78% Oxygen- 21% Ability to Breathe (WHY?) Easier- There are more molecules at sea-level, so you breathe in more oxygen per breath More difficult- There are fewer molecules on the mountain-top, so you have to breathe in more to get enough oxygen Temperature (WHY?) Warmer- Since the air is more dense, there are more molecules to hold the heat Cooler- Since the air is less dense, there are fewer molecules to hold the heat Air Pressure (WHY?)Higher- There is a “larger column of air” pushing down, which means there are more molecules pushing down creating more force Lower- There is a “smaller column of air” pushing down, which means there are fewer molecules pushing down creating less force