Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 464 · 40 questions

What you do (Dry out, crystals in): 1. An adult pours warm water into a cup. 2. Stir in salt, a spoon at a time, until no more dissolves. 3. Pour the salty water into a shallow dish and lay a string in it. 4. Leave it on a sunny windowsill, out of reach of small children, and check each day.

1. 1.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the same dish (c) days to see crystals
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
3. 3.🔍 Which is the odd one out? (a) food colour (b) small pebbles (c) chalk powder (d) sand
4. 4.True or false: rusting iron is a change that can be undone. (a) True (b) False
5. 5.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to cool the water (c) to make it fizz (d) to change its colour
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we change it (b) we keep it the same (c) we measure it
7. 7.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
8. 8.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
9. 9.True or false: melting ice is a change that cannot be undone. (a) True (b) False
10. 10.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) False (b) True
12. 12.🔍 Which is the odd one out? (a) sand (b) table salt (c) baking soda (d) sugar
13. 13.🧂 Which of these dissolves in water? (a) sawdust (b) cooking oil (c) chalk powder (d) baking soda
14. 14.🧂 Which of these does not dissolve in water? (a) baking soda (b) food colour (c) sand (d) sugar
15. 15.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting ice (c) baking a cake (d) freezing water
16. 16.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
17. 17.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
18. 18.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
19. 19.🧂 Which of these does not dissolve in water? (a) glucose powder (b) table salt (c) sugar (d) chalk powder
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) days to see crystals (c) the kind of salt (d) the same dish
22. 22.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
23. 23.🧂 Which of these does not dissolve in water? (a) baking soda (b) sawdust (c) sugar (d) glucose powder
24. 24.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a magnet (c) a shallow dish (d) warm water
26. 26.True or false: small pebbles does not dissolve in water. (a) True (b) False
27. 27.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
28. 28.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
29. 29.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt eats water (d) salt grows roots
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a shallow dish (c) warm water (d) a piece of string
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) True (b) False
32. 32.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
33. 33.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
34. 34.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
35. 35.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
36. 36.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) crystals grow faster (d) it fizzes
37. 37.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
38. 38.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) browning lemon ink (d) melting butter
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
40. 40.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed

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