____________ were used to build houses and other shelters during the Egyptian civilization.

Q. Clay is used for making bricks and flower pots. If the clay article is not dried before 'firing' in a kiln, there will be evaporation of water from the surface and the :

Q. A sample of clay contains $50\%$ silica and $10\%$ water. The sample is partially dried by which it loses $8\text{g}$ water. If the percentage of silica in the partially dried clay is $52$, calculate the percentage of water in the partially dried clay ?

Q. • Have fun with clay
- Take a clay ball.
- Use a rolling pin and roll the clay out flat.
- Make a clay pancake (round like a roti or idli).
- With the help of a matchstick, draw a circle or use a bowl to cut a circle out of the rolled clay.
- Use the extra clay to make eyes, nose, ears and a 'smiley' or a sad face.
- Also try making hair.

• What else can you do to make the face colourful?

Q. A sample of clay contains $50\%$ silica and $10\%$ water. The sample is partially dried by which it loses $8\text{g}$ water. If the percentage of silica in the partially dried clay is $52$, calculate the percentage of water in the partially dried clay ?

Q. Match the shelters in the regions with raw materials used to build them.

A. Houses in Jammu	1. Wood and glass
B. Houseboat in Srinagar	2. Wood, mud and stones
C. Houses in Leh	3. Brick, cement and steel