Question 1:

(i) Show a diagram to show how temperature varies with altitude. Show clearly the location of the tropopause, stratopause and mesopause.

(ii) Briefly explain the troposphere and its characteristics.

Question 2:

i) Describe the terms convection and radiation. Give examples as they apply in the atmosphere.

ii) State the Stefan - Boltzmann law.

iii) Write the mathematical expression of the law.

iv) Determine the amount of energy emitted by the earth in Watts m^-2 at 20 degrees Celsius, given the Stefan -Boltzmann constant, σ = 5.67 x 10^-8 Watts m^-2 K⁴.