Available Answers

1. 1.

   Fill in the blanks.

   1. Air flowing towards the land from the sea is called ______________.
   2. Air flowing towards the sea from the land is called ______________.
   3. ______________ occurs when thick clouds of tiny drops of water from above land or water.
2. 2.

   Tick (√) the correct statement and put a cross (x) against the wrong one.

   1. The process of changing of liquid water into water vapour is known as evaporation.
   2. The process of changing of water vapour into liquid water is known as condensation.
   3. Dewdrops that freeze into tiny ice crystals are known as rain.
   4. Water is present in the air as ice.
   5. Surface water passes through layers of soil to become underground water.
3. 3.

   Change the underlined words to make correct statements. Write the correct statements.

   1. The weatherman decides the weather.
   2. The revolution of the earth on its axis causes day and light.
   3. In winter the days are longer.
   4. A flame burns downwards.
   5. Hot air is heavier than cold air.
   6. In coastal areas hot winds blow towards the land during the day.
   7. Fog is caused by tiny white flakes from the sky.
   8. Rainwater passes easily through non-porous rocks.
4. 4.

   Only one half of the earth has night and the other half has day at any given time. Give reasons.

5. 5.

   Even on a very hot day, people in coastal areas do not feel very hot. Give reasons.

6. 6.

   A wet handkerchief dries faster under a fan. Give reasons.