Match the columns. Column A Column B Black or dark coloured clothes are preferred during (a) daytime Sea breeze blows during (b) radiation Land breeze blows during (c) summer Light coloured clothes are preferred during (d) night No medium is required for transfer of heat by process of (e) winter

Black or dark coloured clothes are preferred during winter because they absorb more heat energy and keep us warm. Sea breeze blows during daytime because the sun heats up both the ocean and surface of the land. Hot air from the land rises up because it is less dense and colder air from the sea rushes to occupy its space. Land breeze blows during night because of high heat index of the ocean water, the ocean cools down slower than the land. So, the air above the surface of sea rises up and cold air from the land rushes towards the empty space created by it. Light coloured clothes are preferred during summer because light colour reflects heat as a result it absorbs less heat energy. No medium is required for the transfer of heat by the process known as radiation. The heat from the sun reaches the earth by the same mode of heat transmission. Column A Column B Black or dark coloured clothes are preferred during (e) winter Sea breeze blows during (a) daytime Land breeze blows during (d) night Light coloured clothes are preferred during (c) summer No medium is required for transfer of heat by process of (b) radiation

Heat is a form of energy which flows from a body at higher temperature to a body at a lower temperature.

Expansion is the increase in the volume of a material when it is heated. Solid, liquid, and gases expand on heating. During heating the particles of the substances move apart and become loosely arranged. This kind of change is known as expansion.

E M B I B E

SCIENCE ROUTE 7>Chapter 7 - Heat Transmission>EXERCISES>Q II

EASY

7th CBSE

IMPORTANT

Earn 100

Transfer of heat by does not require any medium.

50% studentsanswered this correctly

Important Questions on Heat Transmission

EASY

7th CBSE

IMPORTANT

SCIENCE ROUTE 7>Chapter 7 - Heat Transmission>EXERCISES>Q II

_____ cannot takes place in vacuum.

EASY

7th CBSE

IMPORTANT

SCIENCE ROUTE 7>Chapter 7 - Heat Transmission>EXERCISES>Q III

Match the columns.

Column A	Column B
Black or dark coloured clothes are preferred during	(a) daytime
Sea breeze blows during	(b) radiation
Land breeze blows during	(c) summer
Light coloured clothes are preferred during	(d) night
No medium is required for transfer of heat by process of	(e) winter