Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 179 · 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.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
2. 2.🧈 Which of these is a change that can be undone? (a) melting ice (b) milk turning to curd (c) rusting iron (d) browning lemon ink
3. 3.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) safe from small children (d) in a busy doorway
4. 4.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
5. 5.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) salt eats water (d) water evaporates
6. 6.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
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 kept the same. (a) True (b) False
8. 8.⚖️ 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) days to see crystals (c) the same dish (d) the amount of water
9. 9.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) glucose powder (d) sawdust
10. 10.⚖️ 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
11. 11.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) smaller crystals (d) no crystals
12. 12.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) glucose powder (b) cooking oil (c) sugar (d) baking soda
14. 14.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
15. 15.🔍 Which is the odd one out? (a) sand (b) sugar (c) small pebbles (d) chalk powder
16. 16.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
17. 17.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
18. 18.True or false: table salt dissolves in water. (a) False (b) True
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we keep it the same (b) we measure it (c) we change it
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a mirror (d) salt
21. 21.True or false: baking soda does not dissolve in water. (a) True (b) False
22. 22.True or false: chalk powder dissolves in water. (a) False (b) True
23. 23.⚖️ 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
24. 24.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
25. 25.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
26. 26.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) turmeric powder (c) salt (d) a mirror
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the amount of salt
28. 28.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) warm water (c) turmeric powder (d) a piece of string
29. 29.⚖️ 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
30. 30.🧂 Which of these dissolves in water? (a) table salt (b) chalk powder (c) cooking oil (d) sand
31. 31.🔍 Which is the odd one out? (a) baking soda (b) chalk powder (c) sugar (d) food colour
32. 32.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
33. 33.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
34. 34.True or false: sand does not dissolve in water. (a) True (b) False
35. 35.🧂 Which of these dissolves in water? (a) glucose powder (b) sand (c) sawdust (d) chalk powder
36. 36.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a spoon (c) warm water (d) a piece of string
38. 38.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
39. 39.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) saturated (d) magnetic
40. 40.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) chalk powder (d) table salt

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