Often before sunrise on a clear, calm, cold morning, ice (frost) can be seen on the tops of parked cars, even when the air temperature is above freezing. This condition happens because the tops of the cars are cooling by:

Water vapour is:

A. A gas

B. A cloud droplet

C. A rain drop

D. A snowflake

What is the cause of the Exxon Valdez?

A. Oil Tanker which sank in 1989 along the coast of Alaska and marine life seriously affected.

B. a plane which crashed and caused death of human life

C. a ship which wrecked on the coast of India

D. none of these.

In calm air the air temperature is -10^o C, if the wind speed should increase to 30 knots (with no change in air temperature) the thermometer would indicate:

A. A much higher temperature than -10^o C

B. A much lower temperature than -10^o C

C. A temperature of -10^o C

D. A temperature of -30^o C

Infrared and visible satellite images might provide:

A. A way of determining cloud thickness and altitude.

B. A way of distinguishing between wet and dry clouds.

C. A way of identifying clouds suitable for cloud seeding.

D. A way of distinguishing between "new" and "old" clouds.