This document discusses evaporation and the difference between solutions and suspensions. It explains that salt dissolves into water to form a solution, while oil does not dissolve and forms a suspension when mixed with water. Students are then asked a series of multiple choice questions to identify mixtures as either solutions or suspensions.

1. Year 7 Science
Evaporation

2. Water, soil, pig poo, salt, lolly wrappers, oil, grass
Large soil,
pig poo,
lolly
wrappers,
grass
Water, small soil, salt, oil
Small soil

3.  Oil does not “disappear” Wait for the oil to float
into the water. on top and scoop it out
 Oil does not dissolve
into water.
 A mixture of oil and
water is a suspension.

4.  Salt does “disappear” into the
water.
 Salt dissolves into water.
 A mixture of salt and water is
a solution.

5. Q1 – Solution or suspension?
Solution
Suspension

6. Q2 – Solution or suspension?
Solution
Suspension

7. Q3 – Solution or suspension?
Solution
Suspension

8. Q4 – Solution or suspension
Solution
Suspension

9. Q5 – Solution or suspension
Solution
Suspension

10. Q6 – Solution or suspension
Solution
Suspension

11. Q7 – Solution or suspension
Solution
Suspension

12. Q8 – Solution or suspension
Solution
Suspension

13. Q9 – Solution or suspension?
Solution
Suspension

14. Q10 – Solution or suspension?
Solution
Suspension