MEDIUM
Lower Secondary Stage 7
IMPORTANT
Earn 100

Describe two differences between boiling and evaporation.

Important Questions on Properties of Matter and Materials

EASY
Lower Secondary Stage 7
IMPORTANT

Shilpa has just done the washing. Now she is hanging out her clothes in the sunshine. When, she comes back in a few hours her clothes will be dry.

Explain what happens to the water in the wet clothes.

 

MEDIUM
Lower Secondary Stage 7
IMPORTANT

Complete the sentences.

A material that lets light pass through it is_____. An example of this is _____. _____ materials do not allow any light through _____ is an example of this type of material.

MEDIUM
Lower Secondary Stage 7
IMPORTANT

Two full bottles of water were placed in a freezer overnight. The next morning one bottle was cracked, but the other was not. Use your knowledge of materials to explain the observation.

When water freezes it, _____.

If the bottle is made of glass, which is brittle, _____.

If the bottle is made of plastic, which is flexible, _____.

Therefore, one bottle must have been made from _____.

MEDIUM
Lower Secondary Stage 7
IMPORTANT
Explain why chocolate is not usually used to make spoons.
MEDIUM
Lower Secondary Stage 7
IMPORTANT

Clay is a natural material used to make pots and bricks. Clay can be described as both malleable and ductile.

Explain why these are both important properties of clay.

EASY
Lower Secondary Stage 7
IMPORTANT

Identify the physical properties of metals.

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MEDIUM
Lower Secondary Stage 7
IMPORTANT

Sort the materials below into conductors and insulators of electricity.

iron nail                    wooden spoon                 clay brick                    copper wire

Write the words in the correct column: 

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MEDIUM
Lower Secondary Stage 7
IMPORTANT

Look at the two vases. State which vase is made from non-metal. Use the evidence in the images to explain your answer.

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Vase B is made from a _____. It has a crack, which shows that the material is _____.

Vase A is shiny and B is not. Generally metals are _____ and non-metals are _____.