Heat - Part 3 | Assessment | English | Grade 7

Convection takes place in _________.

• Solids

• Liquids

• Gases

• both 2 and 3

Answer explanation

Convection takes place in liquids and gases.

Heat from sun reach us through ________.

• Conduction

• Convection

• Radiation

• None

Answer explanation

Heat from the sun reach us through radiation. It cannot reach us through conduction or convection as there is no medium such as air. Radiation can takes place with or without the medium.

There is no difference between sea breeze and land breeze.

• TRUE

• FALSE

Answer explanation

The air from the sea is called as sea breeze whereas the air from the land is known as land breeze.

We wear light colour clothes in summer and dark colour clothes in winter because ______________ .

• Dark colour clothes absorb more heat while light coloured clothes reflect most of the heat

• Dark colour clothes reflect most of the heat while light coloured clothes absorb heat

• both dark coloured and light colour clothes absorb heat in winter and summer respectively

• both dark coloured and light colour clothes reflects heat in winter and summer respectively

Answer explanation

Dark colour clothes absorb more heat while light coloured clothes reflect most of the heat.