Match the two columns: Column A Column B 1. Average body temperature (i) Radiation 2. Hair and fur of animals (ii) Summer 3. Heat from the sun to the earth (iii) 37 o C 4. Light-coloured clothes (iv) Convection 5. Sea breeze and land breeze (v) Bad conductors of heat

For ( 1 ) - (iii), The normal human body temperature is 37 ° C . It is measured by using a clinical thermometer. For ( 2 ) - (v), The animals of colder regions have hairs and furs on their bodies which traps the air in them. Since the air is a poor conductor of heat, it will not allow the flow of heat from the bodies of the animals to surroundings and keeps them warm. For ( 3 ) - (i), The mode of heat transfer between the sun and the earth is radiation. Radiation does not require a material medium to transfer heat energy. For ( 4 ) - (ii), Light-coloured clothes are good reflectors of heat and are good for summer. A reflector is an object that reflects the heat energy. For ( 5 ) - (iv), The convection mode of heat transfer is the reason behind the generation of cold and hot winds called the sea and land breeze. In convection mode of heat transfer, the particles of the substance move from one place to another to transfer heat. Column A Column B 1 . Average body temperature (iii) 37 ° C 2 . Hair and fur of animals (v) Bad conductors of heat 3 . Heat from the sun to the earth (i) Radiation 4 . Light-coloured clothes (ii) Summer 5 . Sea breeze and land breeze (iv) Convection

E M B I B E

Start Up Science 7>Chapter 4 - Heat>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q B

MEDIUM

7th CBSE

IMPORTANT

Earn 100

What are the different modes of heat transfer?

Important Questions on Heat

MEDIUM

7th CBSE

IMPORTANT

Start Up Science 7>Chapter 4 - Heat>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q B

What do you mean by radiation?

EASY

7th CBSE

IMPORTANT

Start Up Science 7>Chapter 4 - Heat>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q B

Why do you wear more layers of clothes during winter to keep yourself warmer than wearing just one thick piece of cloth?

MEDIUM

7th CBSE

IMPORTANT

Start Up Science 7>Chapter 4 - Heat>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q B

Why do Eskimos live in igloos made of snow?

MEDIUM

7th CBSE

IMPORTANT

Start Up Science 7>Chapter 4 - Heat>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q C

_____ mode of heat transfer do not require any medium.

HARD

7th CBSE

IMPORTANT

Start Up Science 7>Chapter 4 - Heat>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q C

The temperature of a day is measured with _____ (laboratory/ maximum minimum) thermometer.

MEDIUM

7th CBSE

IMPORTANT

Start Up Science 7>Chapter 4 - Heat>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q C

Cooking is faster in _____ vessels. (metal/ non-metal)

MEDIUM

7th CBSE

IMPORTANT

Start Up Science 7>Chapter 4 - Heat>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q C

Match the two columns:

	Column A		Column B
1.	Average body temperature	(i)	Radiation
2.	Hair and fur of animals	(ii)	Summer
3.	Heat from the sun to the earth	(iii)	$37^{o} C$
4.	Light-coloured clothes	(iv)	Convection
5.	Sea breeze and land breeze	(v)	Bad conductors of heat