A puddle is left on a road after a rain shower. The water in the puddle slowly disappears by evaporation. Three statements about the effect of changing different conditions on this process are given below.
1 The rate of evaporation is greater at higher temperatures.
2 The rate of evaporation is greater when the air above the puddle is still.
3 The rate of evaporation is greater when the puddle has a larger surface area.
Which of the statements is/are correct?
(Assume for each statement that all other conditions remain the same.)

Answer:

7) F

1 – Correct
At higher temperatures, there will be more heat energy. Since there will be more heat energy, the rate of evaporation will be greater.

2 – Wrong
Rate of evaporation is greater when there is wind (movement of air).

3 – Correct
Greater the surface area, the greater the number of water molecules in contact with air. Therefore, the greater the rate of evaporation.

F is the answer.