8.1 Physics of the atmosphere

Question 1

What are the properties of air?

Answer 1

21% oxygen
78% nitrogen
1% other

Question 2

If alt increases, what happens to air pressure?

Answer 2

Decreases

Question 3

What is the troposphere?

Answer 3

Starts at earths surface
extends 8-14.5km high
Densest contains all weather activities

Question 4

Where do light aircraft and turboprop fly within?

Answer 4

The troposphere

Question 5

What is the tropopause?

Answer 5

Lies approx 17km above equatorial regions and approx 9km above polar regions

Question 6

What is the stratosphere?

Answer 6

Starts above troposphere and extends to 50 km high
Also contains the ozone layer

Question 7

What are the ISA values at sea level?

Answer 7

Pressure 1013.25
Density 1.225kg/m3
Temperature 288.15k or 15c

Question 8

What is the ozone layer

Answer 8

Where jet aircraft can fly
Constant temp of -56.5 C

Question 9

How much does atmospheric pressure decrease as altitude decreases

Answer 9

6.5 c

Question 10

What is humidity

Answer 10

Amount of water vapour in the air