Question

how does the atmosphere act as a blanket

Answer 1

as atmosphere is consisted of many layers like toposphere, stratosphere . As we know that ozone layer which is also situated in atmosphere protects us from harmful U V rays we can say that atmosphere acts as a blanket

Answer 2

Our atmosphere acts as a blanketbecause: It keeps the average temperature of the earth fairly constant during the day. Theatmosphere prevents the sudden increase in temperature during the daylight hours. During the night, it slows down the escape of heat into outer space