Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 663 · 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: turmeric powder is 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) warm water (b) turmeric powder (c) a piece of string (d) salt
3. 3.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
4. 4.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
5. 5.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) next to the baby (d) in a busy doorway
6. 6.True or false: sugar dissolves in water. (a) True (b) False
7. 7.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) sand (d) glucose powder
8. 8.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
9. 9.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
10. 10.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) rusting iron (d) dissolving salt
11. 11.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a balloon (d) salt
13. 13.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
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 measure it (b) we change it (c) we keep it the same
15. 15.True or false: table salt does not dissolve in water. (a) False (b) True
16. 16.⚖️ 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
17. 17.True or false: rusting iron is a change that can be undone. (a) True (b) False
18. 18.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
19. 19.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) chalk powder (d) food colour
20. 20.True or false: salt is not needed for growing salt crystals. (a) True (b) False
21. 21.⚖️ 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) False (b) True
22. 22.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
23. 23.True or false: freezing water is a change that can be undone. (a) False (b) True
24. 24.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) smaller crystals (d) no crystals
25. 25.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
26. 26.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
27. 27.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
28. 28.⚖️ 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 amount of salt (b) the amount of water (c) sunny or shady place (d) the kind of salt
29. 29.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
30. 30.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) salt (c) a battery cell (d) yeast
31. 31.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
32. 32.⚖️ 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 change it (b) we keep it the same (c) we measure it
33. 33.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
34. 34.⚖️ 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 measure it (c) we keep it the same
35. 35.⚖️ 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 amount of salt (b) sunny or shady place (c) days to see crystals (d) the same dish
36. 36.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) it turns to oil (d) salt crystals form
37. 37.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) dissolving salt (d) cooking an egg
38. 38.⚖️ 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 amount of salt
39. 39.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) a battery cell (d) a shallow dish
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) False (b) True

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