Collect the chalk dust Add a little water to the dust to make a paste. Roll it into the shape of a piece of chalk. Did you recover chalk from the dust?

Change no new substance is formed.

When carbon dioxide is passed through lime water, it turns milky due to the formation of _________.

Boil some water in a container. Do you see the steam rising from the surface of water? Hold an inverted pan by its handle over the steam at some distance from the boiling water. Observe the inner surface of the pan. Do you see any droplet o

Cutting a log of wood into pieces is a chemical change.

Changes in which new substances are formed are called _________ changes.

Properties such as shape, size, colour and state of a substance are called its

The chemical name of baking soda is _________.

Magnesium (Mg) + Oxygen (O2) ---------

Changes in which only _________ properties of a substance change are called physical changes.