Page 129 - Science Class 6 Times Publication

c. Explain an activity which shows that air contains water
vapour.

d. Why does metal like iron get rusted?
e. Mention the chemical properties of air.

Project Work

Take a beaker and ll it half with water. Take a test tube and put

a little steel wool in the test tube. Make the steel wool moist by
putting few drops of water. Invert the test tube and put over the
water of beaker. Mark the level of water in the test tube. Put the
apparatus for 2 days without disturbing. What will you observe?

You can see the rusting of the steel wool. The level of the water
in the test tube rises. This is because the oxygen of the test tube
is used during rusting and water rises to the test tube to take the

space of oxygen.

Times' Crucial Science and Environment 125 Book 6