Make our water safeYear 7 Science

Evaporation

What we have done so far ...

Water, soil, pig poo, salt, lolly wrappers, oil, grass

Large soil, pig poo, lolly wrappers, grass

Water, small soil, salt, oil

Small soil

Oil does not “disappear” into the water.

Oil does not dissolve into water.

A mixture of oil and water is a suspension.

Separating oil and water

Wait for the oil to float on top and scoop it out

Salt does “disappear” into the water.

Salt dissolves into water.

A mixture of salt and water is a solution.

Separating salt and water

Q1 – Solution or suspension?

Solution

Suspension

Q2 – Solution or suspension?

Solution

Suspension

Salt water

Q3 – Solution or suspension?

Solution

Suspension

Sugar water

Q4 – Solution or suspension

Solution

Suspension

Milo

Q5 – Solution or suspension

Solution

Suspension

Petrol and water

Q6 – Solution or suspension

Solution

Suspension

Q7 – Solution or suspension

Solution

Suspension

Cake mixture

Q8 – Solution or suspension

Solution

Suspension

Coffee

Q9 – Solution or suspension?

Solution

Suspension

Blood

Q10 – Solution or suspension?

Solution

Suspension

Aspirin and water