Salt Crystal Experiment Worksheet

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

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