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Science: Elementary School: Grades 3, 4 and 5 Quiz - Materials - Rough And Smooth (Questions)

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Have you ever tried running your hand over a brick wall? It is rough. But the glass in a mirror is really smooth. What is the difference between rough and smooth? Different materials feel very different. Some are soft to the touch. Others are hard and sharp - some are so sharp they could cut you. How materials feel is called their texture. Let’s find out a bit more about the texture of materials.

Click on the pictures for a closer look.

How a material feels is called its _______.

[ ]	Strength
[ ]	Bendiness
[ ]	Texture
[ ]	Warmth

Most school playgrounds are made of tarmac or concrete. The surface of the playground is:

[ ]	Soft
[ ]	Hard
[ ]	Warm
[ ]	Bendy

This playground is covered in bark from trees. You still have to be careful, but the surface is:

[ ]	Harder
[ ]	Softer
[ ]	Colder
[ ]	Smoother

Most roads are made from tarmac. The road surface is:

[ ]	Very smooth
[ ]	Very bumpy
[ ]	Quite rough
[ ]	Quite weak

When the weather is very cold, there is snow and ice. When there is ice on the road, the road is:

[ ]	Smoother
[ ]	Rougher
[ ]	Harder
[ ]	Drier

This man is planing a piece of wood. The wood will be:

[ ]	Harder
[ ]	Softer
[ ]	Rougher
[ ]	Smoother

This man is polishing a car with a machine. The car will be:

[ ]	Rougher and shinier
[ ]	Harder and duller
[ ]	Smoother and shinier
[ ]	Softer and shinier

Wool is ____ to the touch.

[ ]	Hard
[ ]	Soft
[ ]	Cold
[ ]	Cool

This man is rubbing a piece of wood to make it smooth. He is rubbing the wood with sandpaper. The sandpaper is:

[ ]	Smooth
[ ]	Rough
[ ]	Wet
[ ]	Elastic

10.

These are pebbles on a beach. The pebbles are:

[ ]	Rough and weak
[ ]	Rough and flexible
[ ]	Smooth and hard
[ ]	Smooth and soft

Science: Elementary School: Grades 3, 4 and 5 Quiz - Materials - Rough And Smooth (Answers)

How a material feels is called its _______.

[ ]	Strength
[ ]	Bendiness
[x]	Texture
[ ]	Warmth

A running track is quite rough, so the runner’s shoes can grip the track

Most school playgrounds are made of tarmac or concrete. The surface of the playground is:

[ ]	Soft
[x]	Hard
[ ]	Warm
[ ]	Bendy

Have you ever fallen and grazed your knee?

This playground is covered in bark from trees. You still have to be careful, but the surface is:

[ ]	Harder
[x]	Softer
[ ]	Colder
[ ]	Smoother

Which bit of your local playground do you like best?

Most roads are made from tarmac. The road surface is:

[ ]	Very smooth
[ ]	Very bumpy
[x]	Quite rough
[ ]	Quite weak

Roads are quite rough so that car tires can grip the road

When the weather is very cold, there is snow and ice. When there is ice on the road, the road is:

[x]	Smoother
[ ]	Rougher
[ ]	Harder
[ ]	Drier

The road is smooth and slippy. Big trucks spread grit on the road to melt the ice and give cars some grip

This man is planing a piece of wood. The wood will be:

[ ]	Harder
[ ]	Softer
[ ]	Rougher
[x]	Smoother

The man is a carpenter

This man is polishing a car with a machine. The car will be:

[ ]	Rougher and shinier
[ ]	Harder and duller
[x]	Smoother and shinier
[ ]	Softer and shinier

What is your favorite color of car?

Wool is ____ to the touch.

[ ]	Hard
[x]	Soft
[ ]	Cold
[ ]	Cool

A lot of carpets are made from wool

This man is rubbing a piece of wood to make it smooth. He is rubbing the wood with sandpaper. The sandpaper is:

[ ]	Smooth
[x]	Rough
[ ]	Wet
[ ]	Elastic

The rough sandpaper makes the wood smooth

10.

These are pebbles on a beach. The pebbles are:

[ ]	Rough and weak
[ ]	Rough and flexible
[x]	Smooth and hard
[ ]	Smooth and soft

Pebbles are stones. They are made from rock. But they have been made smooth by the sea and the waves