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Materials Year 5
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When something goes from solid to liquids, it...
melts
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What will happen to salt when it is mixed with water?
It will dissolve.
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What are the reactants in rusting?
Water, Iron, Oxygen
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Give an example of an irreversible process.
...
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What is frozen water called?
Ice
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Are chemical reactions reversible or irreversible?
Irreversible
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What gas is made when you mix bicarbonate of soda with vinegar?
Carbon Dioxide
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How do we know when a chemical reaction has taken place?
A new product is formed.
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Is ironing clothes reversible or not?
It is reversible
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Give an example of a reversible process.
...
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How can I recover salt from a saltwater solution?
Evaporate the water so the salt is left behind.
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My chocolate bar has turned to liquid! How can I make it solid again?
Freeze it (make it colder)
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Give an example of a chemical reaction.
...
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What is the scientific formula for water?
H2O
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Give an example of a solvent.
...
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Give an example of a solute.
...
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What is the product in lighting a match?
Ash
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What do we call the point at which water turns to ice?
Freezing point
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