Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 265 · 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: table salt dissolves in water. (a) False (b) True
2. 2.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) saturated (c) magnetic (d) empty
3. 3.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not 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 amount of salt (c) sunny or shady place (d) the same dish
5. 5.True or false: table salt does not dissolve in water. (a) True (b) False
6. 6.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) rusting iron (c) dissolving salt (d) freezing water
7. 7.⚖️ 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
8. 8.True or false: food colour does not dissolve in water. (a) True (b) False
9. 9.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) the youngest child (d) a grown-up
10. 10.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
12. 12.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
13. 13.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a magnet (c) yeast (d) a balloon
14. 14.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) it turns sweet (d) few or no crystals
15. 15.True or false: cooking oil dissolves in water. (a) True (b) False
16. 16.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
17. 17.🧺 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
18. 18.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a battery cell (c) a piece of string (d) a magnet
19. 19.🧂 Which of these dissolves in water? (a) food colour (b) sand (c) cooking oil (d) sawdust
20. 20.⚖️ 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
21. 21.True or false: folding paper is a change that cannot be undone. (a) False (b) True
22. 22.⚖️ 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 keep it the same (c) we change it
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a piece of string (c) salt (d) a spoon
24. 24.⚖️ 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) days to see crystals (c) sunny or shady place (d) the amount of water
25. 25.True or false: melting ice is a change that cannot be undone. (a) True (b) False
26. 26.True or false: folding paper is a change that can be undone. (a) True (b) False
27. 27.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
28. 28.True or false: salt is needed for growing salt crystals. (a) False (b) True
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a piece of string (c) yeast (d) a shallow dish
30. 30.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) warm water (c) a spoon (d) a piece of string
32. 32.🧂 Which of these dissolves in water? (a) baking soda (b) small pebbles (c) sand (d) sawdust
33. 33.True or false: glucose powder does not dissolve in water. (a) False (b) True
34. 34.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
35. 35.True or false: baking soda 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) salt (c) a mirror (d) a spoon
37. 37.True or false: rusting iron is a change that can be undone. (a) True (b) False
38. 38.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
39. 39.⚖️ 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 measure it (b) we change it (c) we keep it the same
40. 40.True or false: warm water is not needed for growing salt crystals. (a) False (b) True

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