Chapter 11 – Our Home and Environment
EXERCISES
1. (a) Which of the following houses would be suitable in a mountainous region? Put a ‘✓’ in the appropriate box. Give reasons for selecting that house.
Ans: A small, multi-story house made up of bricks, stones, cement, and roof tiles would be suitable in a mountainous region.
Reasons:
(1) In a mountainous region, the amount of rainfall and the speed of wind are quite high. Therefore, in such a region, a house made up of clay, mud, sticks, etc. would not be suitable. In such a region, a house made up of bricks, stones, cement, and roof tiles would be suitable.
(2) In a mountainous region, there is less plain surface land available. Therefore, in such a region, a small multi-story house would be more suitable than a big single-story house.
(b) What materials will you mainly use for building a multi-storeyed house? Choose the correct option.
(a) Mortar / coal / cement / bricks
(b) Cement / bricks / cotton / iron
(c) Iron / cement / mortar / bricks
Ans: Option (c) – Iron / cement / mortar / bricks
We will us iron rods, cement, mortar, bricks, etc. for building a multi-storeyed house.
2. Arrange the following considerations from the most to least important in house-building.
(a) Luxury
(b) Structure
(c) Climate
Ans: We will prefer the above things in the following sequence while building a house:
(a) Climate
(b) Luxury
(c) Structure
3. Write the following.
(a) List the eco-friendly things in your house.
Ans: The following gadgets in the house can be run on solar energy;
(1) Solar fans
(2) Solar lamps,
(3) Solar clocks,
(4) Solar geyser,
(5) Solar cookers, etc.
(b) Which of the gadgets in the house can be run on solar energy?
Ans: The eco-friendly things in my house are:
(1) Solar cooker,
(2) Spacious windows,
(3) A big earthen pot in which organic fertilizers are made,
(4) Flower plants in the open space in front of the house,
(5) A tank constructed to store the rainwater.
4. What are the types of pollution that can be observed at a construction site ?
Ans: Air pollution, water pollution, soil pollution and noise pollution are the types of pollution that can be observed at a construction site.