Fast Facts before doing the quiz

• Dissolving means a solid has become part of the liquid.
• Evaporating means a liquid becoming a gas e.g. when water boils.
• Condensing is when gas become liquid on a cold surface e.g. when you breathe on a cold window the water vapour in your breath appears as liquid.
• Melting is when a solid becomes a liquid and is caused by a rise in temperature. Some materials e.g. metals, have higher melting points than others. The opposite of melting is freezing or solidifying.

What equipment would you use to separate out the following mixed up materials?

Choose from : Magnet, filter paper and funnel, sieve, spoon and burner

a) stones and water

b) pins and rice

c) sand and gravel

d) sand and water (stirred)

e) flour and rice crispies

f) sugar and water

Materials can be changed in different ways - Some can be reversed and some can't. Which of the following can be reversed?

The answers to the following questions are either 'can be reversed' or 'cannot be reversed'.

True or false?

Einstein Questions