Reversible or irreversible changes

Reversible changes can be used to recycle materials such as...
Disposable nappies and plasters
Paper, plastic and glass
Solids that have different sized particles such as ________ can be separated by using a sieve.
Table salt and caster sugar
Flour and instant coffee grains
Sand and sugar
What happens when you mix oil and water?
They both dissolve
Melting
The more dense liquid sinks and the less dense liquid rises to the top
An irreversible change is...
A car changing something by reversing over it
Permanent. It will never go back to what it originally was.
A change which can be undone.
Rusting, burning and cooking are all _________ changes
Reversible
Irreversible
Melting, freezing and evaporating are ___________ changes
Reversible
Irreversible
Which is an irreversible change?
Water turning into steam
Frying an egg
 
Baking a cake is
Irreversible
Reversible
A nail rusting is
Irreversible
Reversible
Which will dissolve in water?
Oil
Sugar
Sand
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