Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 149 · 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.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a balloon (d) warm water
3. 3.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
4. 4.⚖️ 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) days to see crystals (b) the same dish (c) sunny or shady place (d) the kind of salt
5. 5.🔮 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
6. 6.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sea water evaporates (c) sand is ground up (d) salt rains down
7. 7.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
8. 8.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) sand (d) sugar
9. 9.True or false: yeast is needed for growing salt crystals. (a) False (b) True
10. 10.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
11. 11.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
12. 12.⚖️ 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 measure it (c) we keep it the same
13. 13.🧂 Which of these does not dissolve in water? (a) sawdust (b) glucose powder (c) sugar (d) baking soda
14. 14.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
15. 15.True or false: food colour does not dissolve in water. (a) True (b) False
16. 16.🧂 Which of these does not dissolve in water? (a) glucose powder (b) cooking oil (c) baking soda (d) table salt
17. 17.⚖️ 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 change it (b) we keep it the same (c) we measure it
18. 18.⚖️ 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) the amount of water (c) sunny or shady place
19. 19.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
20. 20.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) browning lemon ink (c) melting ice (d) rusting iron
21. 21.🧺 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) a mirror
22. 22.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) salt (c) a piece of string (d) a shallow dish
24. 24.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) a magnet (d) warm water
25. 25.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
26. 26.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
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.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we change it (c) we keep it the same
29. 29.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) sawdust (d) table salt
30. 30.🧂 Which of these dissolves in water? (a) chalk powder (b) glucose powder (c) sawdust (d) sand
31. 31.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
32. 32.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
34. 34.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
35. 35.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a piece of string (c) a shallow dish (d) salt
37. 37.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
38. 38.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
39. 39.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) few or no crystals (d) crystals grow faster
40. 40.True or false: small pebbles does not dissolve in water. (a) True (b) False

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