Question 17
Change of State and VapoursDewpoint is the temperature at which water vapour
- A.turns into steam
- B.solidifies in the atmosphere into ice pellets
- C.first condenses into liquid form
- D.is just sufficient to cause cooling
- E.has a relative humidity of fifty per cent.
Show the answer and explanation
Answer: C (first condenses into liquid form)
Explanation
At the dew point the air becomes saturated, so cooling it any further makes the water vapour start to condense into liquid drops (dew).