Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 348 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) turmeric powder (d) a spoon
2. 2.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
3. 3.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
4. 4.⚖️ 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
5. 5.True or false: baking soda dissolves in water. (a) False (b) True
6. 6.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) next to the baby (d) on the edge of a table
7. 7.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
8. 8.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a magnet (c) warm water (d) a shallow dish
10. 10.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
11. 11.True or false: melting ice is a change that can be undone. (a) False (b) True
12. 12.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a shallow dish (d) a battery cell
14. 14.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) folding paper (c) baking a cake (d) freezing water
15. 15.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to oil (c) salt crystals form (d) it turns to butter
16. 16.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) cooking oil (d) glucose powder
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
18. 18.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
19. 19.⚖️ 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
20. 20.⚖️ 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 kind of salt (b) days to see crystals (c) sunny or shady place (d) the amount of salt
21. 21.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
22. 22.True or false: sugar dissolves in water. (a) True (b) False
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a mirror (d) a piece of string
24. 24.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
25. 25.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) True (b) False
27. 27.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) milk turning to curd (d) freezing water
28. 28.⚖️ 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
29. 29.True or false: small pebbles dissolves in water. (a) False (b) True
30. 30.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
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 kept the same. (a) False (b) True
32. 32.True or false: glucose powder does not dissolve in water. (a) False (b) True
33. 33.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
34. 34.True or false: salt is needed for growing salt crystals. (a) True (b) False
35. 35.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
36. 36.True or false: warm water is needed for growing salt crystals. (a) False (b) True
37. 37.🧈 Which of these is a change that can be undone? (a) rusting iron (b) milk turning to curd (c) melting butter (d) cooking an egg
38. 38.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it fizzes (c) crystals grow faster (d) it turns sweet
39. 39.🔍 Which is the odd one out? (a) glucose powder (b) food colour (c) sand (d) sugar
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) warm water (c) a magnet (d) a piece of string

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