Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 442 · 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 is a change that can be undone? (a) dissolving salt (b) browning lemon ink (c) baking a cake (d) rusting iron
2. 2.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
3. 3.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) it fizzes (d) crystals grow faster
4. 4.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
5. 5.⚖️ 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) True (b) False
6. 6.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) it turns to oil (d) sugar crystals form
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the kind of salt
8. 8.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
9. 9.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
12. 12.⚖️ 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 kind of salt (b) the amount of salt (c) sunny or shady place (d) days to see crystals
13. 13.⚖️ 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 kind of salt (b) the same dish (c) days to see crystals (d) sunny or shady place
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) turmeric powder (d) warm water
15. 15.🧂 Which of these does not dissolve in water? (a) sawdust (b) baking soda (c) sugar (d) table salt
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 the one thing we change. (a) True (b) False
17. 17.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
18. 18.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) melting ice (d) rusting iron
19. 19.⚖️ 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) False (b) True
20. 20.True or false: sand does not dissolve in water. (a) False (b) True
21. 21.⚖️ 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) True (b) False
22. 22.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting butter (c) rusting iron (d) cooking an egg
23. 23.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it very salty (d) to make it fizz
24. 24.🧂 Which of these does not dissolve in water? (a) food colour (b) cooking oil (c) glucose powder (d) baking soda
25. 25.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
26. 26.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) salt grows roots (d) the dish melts
27. 27.⚖️ 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 keep it the same (c) we change it
28. 28.True or false: dissolving salt is a change that can be undone. (a) False (b) True
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) salt (c) a piece of string (d) a shallow dish
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a shallow dish (d) a battery cell
31. 31.⚖️ 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 keep it the same (c) we change it
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) warm water (d) yeast
33. 33.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
34. 34.⚖️ 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 measure it (b) we change it (c) we keep it the same
35. 35.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
36. 36.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) the youngest child (d) nobody needs to
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
38. 38.⚖️ 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) True (b) False
39. 39.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) sugar (d) cooking oil

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