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Welcome to the Materials Quiz (ages 10 11) Changes And Reactions Of Materials (ages 10 11)

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Q1:What material is used to make pencil leads?

CoalCharcoalGraphite

Q2:What property makes a window clear?

OpacityElasticityTransparency

Q3:Why is aluminum used in airplanes?

It is strong and lightIt is heavyIt is colorful

Q4:What happens to most materials when cooled?

They expandThey meltThey contract

Q5:Why are conductors important in circuits?

They block electricityThey light upThey allow electricity to flow

Q6:Why is fabric often blended from two materials?

To combine useful propertiesTo reduce weightTo look better

Q7:Which of these changes is irreversible?

Melting waxFreezing waterBurning wood

Q8:Which of these is a composite material?

AluminiumConcreteSteel

Q9:What is filtration used for?

Freezing liquidsSeparating solids from liquidsMixing materials

Q10:How does condensation occur?

Solid meltsGas cools and becomes liquidLiquid evaporates

Q11:How can you separate sand from salt water?

Boil and coolFilter onlyFilter and boil

Q12:Which material is least suitable for roof tiles?

WoodSlateGlass