Riddle

How often is the air's water replenished?

Choose an answer

A.Once
B.10 times
C.100 times
D.40 times a year
Hint: It's a 3-word phrase with 10 letters, starting with "4".

Answer

40 times a year

Why this is the answer

The atmosphere's water content is small but cycles extremely rapidly.

This riddle is filed under Science Riddles and rated Hard.

Related Riddles

All Science Riddles