Give reasons:

When a stone is dipped in a glass containing some water, the level of water rises but when a spoon of sugar is added to it and stirred, the water level does not rise?

Give reasons:

A drop of ink added to water in a glass turns the whole water blue.

Fill in the blanks:

(a) Air is a matter because it has …………… and …………… and it can be …………… .

(b) The molecules are made up of …………… .

(c) The quantity of matter in an object is called its …………… .

(d) The state of matter with definite volume and definite shape is called …………… .

(e) The substances which can flow are called …………… .

Name the terms for the following:

(a) The change of a solid into liquid.

(b) The force of attraction between the molecules of matter.

(c) The particles of matter which may or may not have independent existence.

(d) The process due to which a solid directly changes into its vapours.

(e) The change of vapour into a liquid.