Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 879 · 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) sand (b) table salt (c) small pebbles (d) chalk powder
2. 2.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it turns sweet (d) it fizzes
3. 3.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
4. 4.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a mirror (c) a piece of string (d) turmeric powder
5. 5.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) rusting iron (d) dissolving salt
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a balloon (d) a shallow dish
7. 7.🧂 Which of these does not dissolve in water? (a) glucose powder (b) food colour (c) sugar (d) chalk powder
8. 8.⚖️ 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) True (b) False
9. 9.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) on the edge of a table (d) in a busy doorway
10. 10.True or false: glucose powder does not dissolve in water. (a) False (b) True
11. 11.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
12. 12.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) melting ice (c) cooking an egg (d) baking a cake
13. 13.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
14. 14.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
15. 15.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a spoon (c) yeast (d) a battery cell
16. 16.⚖️ 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 change it (c) we measure it
17. 17.True or false: food colour dissolves in water. (a) False (b) True
18. 18.⚖️ 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 water
19. 19.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) nobody needs to (d) a friend who is running
20. 20.🔍 Which is the odd one out? (a) sawdust (b) chalk powder (c) glucose powder (d) sand
21. 21.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) salt crystals form (d) it turns to butter
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) salt (d) a magnet
23. 23.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
24. 24.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) cooking an egg (c) freezing water (d) melting ice
25. 25.True or false: sawdust dissolves in water. (a) False (b) True
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a piece of string (d) a battery cell
27. 27.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it fizz (d) to make it very salty
28. 28.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
30. 30.True or false: dissolving salt is a change that can be undone. (a) True (b) False
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a shallow dish (d) a mirror
32. 32.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
33. 33.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) bigger crystals (d) no crystals
34. 34.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) salt (c) warm water (d) a piece of string
35. 35.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
36. 36.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
37. 37.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
38. 38.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
39. 39.True or false: chalk powder does not dissolve in water. (a) False (b) True
40. 40.⚖️ 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 keep it the same (c) we measure it

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