Question

Cloudy nights are warmer compared to clear cloudless nights, because clouds:  

(a) prevent clod waves from the sky from descending on earth

(b) reflect back the heat given off by earth

(c) produce heat and radiate it towards earth

(d) absorb heat from the atmosphere and send it towards earth

Answer 1

(b) Cloudy nights are warmer than clear nights because, the cloud cover provides a shield which act as an insulator and store up the heat radiated by the earth and do not permit heat to escape.