Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 719 · 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.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) sawdust (d) glucose powder
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a piece of string (d) yeast
3. 3.⚖️ 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 change it (b) we keep it the same (c) we measure it
4. 4.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a balloon (c) a mirror (d) salt
5. 5.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
6. 6.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting butter (c) melting ice (d) browning lemon ink
7. 7.⚖️ 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) False (b) True
8. 8.⚖️ 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
9. 9.True or false: melting ice is a change that cannot be undone. (a) False (b) True
10. 10.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
11. 11.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) fish make it (c) sand is ground up (d) salt rains down
12. 12.🔍 Which is the odd one out? (a) sugar (b) cooking oil (c) chalk powder (d) sand
13. 13.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
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.🧂 Which of these dissolves in water? (a) chalk powder (b) small pebbles (c) cooking oil (d) food colour
16. 16.🛟 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
17. 17.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
18. 18.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) salt crystals form (d) it turns to oil
19. 19.🧈 Which of these is a change that can be undone? (a) rusting iron (b) folding paper (c) milk turning to curd (d) browning lemon ink
20. 20.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
21. 21.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
22. 22.True or false: freezing water is a change that can be undone. (a) True (b) False
23. 23.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
24. 24.True or false: dissolving salt is a change that can be undone. (a) True (b) False
25. 25.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
26. 26.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a piece of string (c) turmeric powder (d) a mirror
27. 27.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
28. 28.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
29. 29.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a magnet (d) a piece of string
31. 31.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) smaller crystals (d) bigger crystals
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) salt (d) a balloon
33. 33.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
34. 34.True or false: sand dissolves in water. (a) False (b) True
35. 35.🧂 Which of these does not dissolve in water? (a) baking soda (b) chalk powder (c) sugar (d) table salt
36. 36.🔍 Which is the odd one out? (a) cooking oil (b) sawdust (c) chalk powder (d) glucose powder
37. 37.⚖️ 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 same dish (b) the amount of salt (c) the amount of water (d) days to see crystals
38. 38.🧂 Which of these dissolves in water? (a) cooking oil (b) baking soda (c) sawdust (d) chalk powder
39. 39.⚖️ 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 change it (c) we measure it
40. 40.True or false: melting ice is a change that can be undone. (a) True (b) False

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