Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 795 · 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? True or false: the kind of salt is kept the same. (a) True (b) False
2. 2.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
3. 3.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
4. 4.True or false: sugar does not dissolve in water. (a) True (b) False
5. 5.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) saturated (d) empty
6. 6.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) baking a cake (c) dissolving salt (d) browning lemon ink
7. 7.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a spoon (c) a battery cell (d) a magnet
8. 8.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
9. 9.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) salt (c) a spoon (d) a shallow dish
12. 12.⚖️ 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) sunny or shady place (b) the amount of salt (c) the same dish (d) the amount of water
13. 13.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) chalk powder (d) glucose powder
14. 14.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) few or no crystals (d) it turns sweet
15. 15.True or false: food colour dissolves in water. (a) True (b) False
16. 16.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to butter (d) it turns to oil
17. 17.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
18. 18.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) warm water (c) a balloon (d) a magnet
19. 19.⚖️ 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 measure it (b) we change it (c) we keep it the same
20. 20.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
21. 21.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
22. 22.True or false: melting ice is a change that cannot be undone. (a) True (b) False
23. 23.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
24. 24.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
25. 25.True or false: a shallow dish is not 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? True or false: days to see crystals is what we measure. (a) False (b) True
27. 27.🧂 Which of these does not dissolve in water? (a) sand (b) table salt (c) sugar (d) glucose powder
28. 28.🔍 Which is the odd one out? (a) sawdust (b) chalk powder (c) sand (d) table salt
29. 29.🧂 Which of these does not dissolve in water? (a) baking soda (b) sugar (c) chalk powder (d) food colour
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the amount of water (b) days to see crystals (c) sunny or shady place
31. 31.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) rusting iron (d) freezing water
32. 32.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
33. 33.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) chalk powder (d) sugar
34. 34.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
35. 35.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) the dish melts (d) salt grows roots
36. 36.⚖️ 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
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) yeast (c) a shallow dish (d) salt
38. 38.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) no crystals (d) liquid crystals
39. 39.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
40. 40.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve

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