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Practice - Materials and Their Properties - 06

Hello, enhusiastic scientists! Get ready for an adventure as we explore the fascinating world of materials and their properties. Do you know why ice floats or why metals are hard? Let's test your knowledge and have some fun! Remember – it's okay to make mistakes, because that's how we learn! Are you ready? Let's quiz!
1.
What happens to most materials when they are heated?
They expand
They shrink
They become heavier
They remain the same
Most materials expand when they are heated because their molecules move faster and take up more space.
2.
Which of these substances dissolves in water?
Crayon
Salt
Oil
Sand
Salt is soluble in water, unlike oil, crayon, and sand which do not dissolve in water.
3.
In what form is water at 0 degrees Celsius?
Gas
Solid
Liquid
All of the above
At 0 degrees Celsius, water freezes and becomes a solid, which we call ice.
4.
Which of these is not a natural material?
Wood
Stone
Leather
Plastic
Plastic is a man-made material. Wood, stone, and leather are natural materials.
5.
Which material from the following is not magnetic?
Steel
Iron
Plastic
Nickel
Plastic is not magnetic. Iron, steel, and nickel all have properties that make them magnetic.
6.
Which material is transparent?
Wood
Aluminium
Cotton fabric
Glass
Glass is a transparent material – you can see through it clearly. Wood, aluminium, and cotton fabric are not transparent.
7.
Which is the best conductor of electricity?
Glass
Metal
Wood
Plastic
Metals are good conductors and silver is the best conductor of electricity. However, because of its cost, copper is often used for electrical wiring instead.
8.
Which state of matter has a definite volume but takes the shape of its container?
Solid
Liquid
Gas
Plasma
A liquid has a definite volume, but it does not have a definite shape, so it takes the shape of its container.
9.
What property do elastic bands have that makes them useful?
They shine
They stretch
They smell nice
They are heavy
Elastic bands are very useful because they stretch. This stretching property makes them flexible and able to hold things together.
10.
Which material is not a good insulator?
Wool
Aluminium
Styrofoam
Rubber
Aluminium is a metal and a good conductor of heat, therefore, it's not a good insulator. Wool, Styrofoam and rubber are good insulators.
Author:  Graeme Haw

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