Question

The lowest temperature is usually observed:
A) At the time of sunset
B) Near midnight
C) Several hours before sunrise
D) Around sunrise

Answer 1

Hint: The average temperature of the earth is maintained by the gases present in the atmosphere. You must be knowing that the temperature of the earth increases and decreases as per climatic changes. During winter temperature decreases and during summer it increases. When the sun is at its peak, we feel hot due to the increase in temperature.

Complete answer:
Option A) At the time of sunset: At the time of sunset the temperature is average. We have observed at the time of sunset we don’t feel either too hot or too cold so at this time we can say that the temperature is not too high or low. The observed temperature during this time is \[23^\circ C\] to $24^\circ C$ which is an average temperature.
So, option A is not correct.
Option B) Near midnight: Near midnight the temperature can be $1$ to $2$ degree lower than in the daytime. But as we reach midnight our body temperature also starts decreasing so that we will get a good sleep. But this temperature is not considered as low during the day.
So, option B is not correct.
Option C) Several hours before sunrise: You must have seen that several hours before sunrise i.e., from $3am$ to $6am$ the temperature is average it is neither high or low. When we get up at this time, we don’t feel hot or cold as the temperature is average at this time period.
So, option C is not correct.
Option D) Around sunrise: Around sunrise when the first beam of light coming toward earth has very weak solar radiation. It does not have any strength to counter the heat which is escaping from the surface and hence temperature is low during this time. You must have observed when you go out at $7am$ you feel cool as compared to noon time.

So option D is the correct answer.

Note:
The diurnal temperature of the earth keeps on increasing and decreasing. It is noted that the temperature is high from afternoon time to the time of sunset.