Page 143 - Arrow Publications Pvt. Ltd.

Almost one billion people around the world live in bamboo
Did You homes. In Bangladesh, 73 % of people live in houses made
Know? of Bamboo. You can see many beautifully built bamboo
houses in the tribal areas. There are more than 32 species
of bamboo in Bangladesh.

Let us know how different building materials are made.

Bricks

Bricks are the basic material used for

the construction of houses and dams.

Bricks are made of clay. Clay is easily

available in large quantities on the sides

of lakes and rivers. Clay is dug from the

earth. Then it is mixed with water to
make it soft. Wet clay is given the shape of bricks by putting it in the moulds.

Think &
Answer You may have noticed that every brick used in a house’s construction is the same
size. Why do bricks come in the same size? What would happen if they vary in size?

The wet bricks are dried in the sun. The dried bricks are baked in a brick kiln.

The hot bricks are then cooled.

Wet bricks Dried bricks Brick kiln

Bricks are used to build walls. Walls are

constructed by arranging bricks and joining

them with cement.

Walls built using bricks
142 | Arrow - EVS Plus-4
142