Salt Crystal Experiment Worksheet

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

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