The atmosphere: gases and layers
Answers are for parents and teachers.
1
How many litres of nitrogen are in 8000 L of dry air?
78% of 8000 = 6240 L.
2
The ground temperature is 28 °C. Find the temperature at 6 km.
28 − 6 × 6.5 = 28 − 39 = −11 °C.
3
Explain why aircraft like to fly in the lower stratosphere.
The air moves mostly sideways and is calm, so there is little turbulence.
4
On a scale of 1 cm = 5 km, how long is the line for 85 km?
85 ÷ 5 = 17 cm.
5
Write, in order, how the temperature changes through the four lowest layers.
Falls in the troposphere, rises in the stratosphere (ozone), falls in the mesosphere, rises in the thermosphere.