Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 536 · 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? What do we do with “the same dish”? (a) we change it (b) we keep it the same (c) we measure it
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: folding paper? (a) can be undone (b) cannot be undone
4. 4.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
5. 5.⚖️ 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 keep it the same (b) we measure it (c) we change it
6. 6.🧂 Which of these dissolves in water? (a) sawdust (b) food colour (c) cooking oil (d) small pebbles
7. 7.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) a mirror (d) a piece of string
8. 8.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a spoon (d) a balloon
9. 9.⚖️ 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
10. 10.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to change its colour (c) to cool the water (d) to make it fizz
11. 11.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
12. 12.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) it turns to oil (d) sugar crystals form
13. 13.⚖️ 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
14. 14.True or false: sand dissolves in water. (a) True (b) False
15. 15.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
16. 16.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a balloon (d) a piece of string
18. 18.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
19. 19.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
20. 20.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
21. 21.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) dissolving salt (c) folding paper (d) melting ice
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) True (b) False
23. 23.⚖️ 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
24. 24.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) a grown-up (d) nobody needs to
25. 25.🔍 Which is the odd one out? (a) baking soda (b) chalk powder (c) glucose powder (d) sugar
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 the one thing we change. (a) False (b) True
27. 27.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) the dish melts (d) salt eats water
28. 28.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) saturated (d) frozen
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a shallow dish (c) a spoon (d) a piece of string
31. 31.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) warm water (c) a spoon (d) salt
33. 33.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a spoon (c) yeast (d) a battery cell
34. 34.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
35. 35.True or false: glucose powder does not dissolve in water. (a) True (b) False
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a mirror (d) salt
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) turmeric powder (d) a shallow dish
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a piece of string (d) yeast
39. 39.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) smaller crystals (d) bigger crystals
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a magnet (c) salt (d) a spoon

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