Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 620 · 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 is the odd one out? (a) sawdust (b) chalk powder (c) sand (d) table salt
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) True (b) False
3. 3.⚖️ 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 change it (b) we measure it (c) we keep it the same
4. 4.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
5. 5.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) saturated (d) frozen
6. 6.⚖️ 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 keep it the same (c) we change it
7. 7.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) water evaporates (d) the dish melts
8. 8.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) a grown-up (d) the youngest child
9. 9.True or false: food colour does not dissolve in water. (a) False (b) True
10. 10.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
11. 11.True or false: dissolving salt is a change that can be undone. (a) False (b) True
12. 12.🧂 Which of these dissolves in water? (a) sand (b) table salt (c) sawdust (d) chalk powder
13. 13.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) browning lemon ink (d) melting butter
14. 14.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
15. 15.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
16. 16.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a balloon (c) warm water (d) a shallow dish
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a mirror (c) a spoon (d) warm water
19. 19.🧂 Which of these does not dissolve in water? (a) baking soda (b) table salt (c) sand (d) food colour
20. 20.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) it fizzes (d) few or no crystals
21. 21.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a mirror (d) a shallow dish
22. 22.⚖️ 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) sunny or shady place (b) the amount of salt (c) days to see crystals (d) the amount of water
23. 23.🔍 Which is the odd one out? (a) glucose powder (b) sawdust (c) small pebbles (d) sand
24. 24.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a mirror (c) a piece of string (d) a balloon
25. 25.⚖️ 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
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) False (b) True
27. 27.🧂 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) small pebbles (d) sugar
28. 28.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
29. 29.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
30. 30.True or false: sawdust dissolves in water. (a) True (b) False
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
32. 32.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
33. 33.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
34. 34.🧂 Which of these dissolves in water? (a) baking soda (b) sawdust (c) chalk powder (d) cooking oil
35. 35.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
37. 37.True or false: glucose powder dissolves in water. (a) True (b) False
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) salt (c) a shallow dish (d) warm water
39. 39.⚖️ 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
40. 40.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False

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