Snow insulates the ground well because:
a. the air between the individual snowflakes allows shortwave radiation to penetrate the snow and warm the ground.
b. the air between the individual snowflakes is a good insulator.
c. ice is a better insulator than air.
d. All of these choices.
Question 2
Raindrops that reach the earth's surface seldom have diameters larger than:
a. 0.006 mm.
b. 0.6 mm.
c. 0.06 mm.
d. 6 mm.