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Practice - Materials and Their Properties - 08
Welcome smart Scientists! Are you ready to dive into the world of materials and discover their unique properties? Get ready to explore different substances from everyday life and learn how they are used based on their characteristics. So put on your thinking caps and let's see how much you know about materials and their uses!
1.
Which material is not magnetic?
Iron
Copper
Steel
Nickel
Copper is not a magnetic material, unlike iron, steel and nickel.
2.
Which material is used to make bulletproof vests due to its high strength and lightweight properties?
Plastic
Kevlar
Cotton
Aluminium
Kevlar is has a high strength-to-weight ratio, making it ideal for making bulletproof vests.
3.
What property of rubber makes it useful for making erasers?
Its transparency
Its brittleness
Its elasticity
Its absorbency
The elasticity of rubber makes it useful for erasers. It can return to its original form and pick up pencil and graphite particles.
4.
Which material is commonly used for wiring because it conducts electricity very well?
Copper
Rubber
Wood
Glass
Copper is an excellent conductor of electricity and is commonly used for electrical wiring.
5.
Which of these materials is a good insulator of heat?
Copper
Iron
Glass
Wool
Wool is a bad conductor of heat, so it helps keep in body heat. It's used to make jumpers and winter coats.
6.
Which of the following materials is waterproof and is often used to make raincoats?
Wood
Plastic
Cotton
Paper
Plastic is impermeable to water, hence, it is commonly used to make raincoats.
7.
Why is wood often used to make furniture?
Because it's a good conductor of electricity
Because it's soft and comfortable
Because it's strong and durable
Because it's heat resistant
Wood is both strong and durable, it is often used to make furniture.
8.
Which material is often used to insulate houses because it traps air?
Iron
Wood
Glass
Fiberglass
Fiberglass is a good insulator because it traps air, reducing the loss of heat.
9.
What property of glass makes it useful for making windows?
It is colourful
It is transparent
It is opaque
It is brittle
Glass is transparent (see through) which makes it suitable for windows.
10.
Why are baking trays usually made of metal?
Because metal is elastic
Because metal is a good conductor of electricity
Because metal is a good conductor of heat
Because metal is waterproof
Metal is a good conductor of heat, thus it distributes the oven's heat evenly to the food.
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