Draw a diagram showing the temperature of various layers of water in an ice covered pond.

The gases which are good …………… of long wavelength infrared radiations are called greenhouse gases.

1. emitters
2. reflectors
3. absorbers
4. none of the above

The increase of carbon dioxide gas in atmosphere will cause —

1. decrease in temperature
2. increase in temperature
3. decrease in humidity
4. increase in humidity

Without green house effect, the average temperature of earth’s surface would have been —

1. -18°C
2. 33°C
3. 0°C
4. 15°C