Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 339 · 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.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
2. 2.🔍 Which is the odd one out? (a) glucose powder (b) small pebbles (c) food colour (d) table salt
3. 3.True or false: sand does not dissolve in water. (a) False (b) True
4. 4.⚖️ 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 change it (b) we keep it the same (c) we measure it
5. 5.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we measure it (b) we keep it the same (c) we change it
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we keep it the same (c) we change it
8. 8.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
9. 9.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
10. 10.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) a balloon (d) salt
11. 11.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
12. 12.True or false: melting butter is a change that can be undone. (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) small pebbles (b) sawdust (c) sand (d) sugar
14. 14.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
15. 15.🧂 Which of these does not dissolve in water? (a) glucose powder (b) chalk powder (c) table salt (d) food colour
16. 16.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
17. 17.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a battery cell (c) a shallow dish (d) a magnet
18. 18.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) cooking oil (d) sugar
19. 19.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
20. 20.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
21. 21.⚖️ 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 measure it (b) we change it (c) we keep it the same
22. 22.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
23. 23.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) saturated (d) magnetic
24. 24.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) it fizzes (d) few or no crystals
25. 25.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we keep it the same (b) we measure it (c) we change it
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the amount of water (c) sunny or shady place (d) the kind of salt
28. 28.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) small pebbles (d) sugar
29. 29.True or false: folding paper is a change that can be undone. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) food colour (d) sawdust
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a magnet (c) salt (d) warm water
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a piece of string (d) yeast
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a balloon (c) a shallow dish (d) salt
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
36. 36.🔍 Which is the odd one out? (a) table salt (b) sand (c) sugar (d) baking soda
37. 37.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
38. 38.🧂 Which of these dissolves in water? (a) food colour (b) chalk powder (c) cooking oil (d) sawdust
39. 39.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True

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