Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 416 · 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? True or false: the amount of water is kept the same. (a) True (b) False
2. 2.🔍 Which is the odd one out? (a) cooking oil (b) sugar (c) sawdust (d) chalk powder
3. 3.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) folding paper (d) rusting iron
4. 4.🔍 Which is the odd one out? (a) small pebbles (b) sawdust (c) baking soda (d) cooking oil
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a spoon (d) a balloon
6. 6.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
7. 7.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
8. 8.⚖️ 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) True (b) False
9. 9.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
10. 10.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) crystals grow faster (d) few or no crystals
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) days to see crystals (c) the amount of water (d) the kind of salt
12. 12.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a battery cell (d) salt
15. 15.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) folding paper (c) milk turning to curd (d) melting ice
16. 16.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) no crystals (d) liquid crystals
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) salt (d) yeast
18. 18.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
19. 19.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) water evaporates (d) salt eats water
20. 20.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) browning lemon ink (d) freezing water
21. 21.⚖️ 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 measure it (b) we change it (c) we keep it the same
22. 22.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a balloon (c) turmeric powder (d) a spoon
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a balloon (d) a piece of string
24. 24.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
25. 25.⚖️ 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 change it (c) we keep it the same
26. 26.🧂 Which of these does not dissolve in water? (a) baking soda (b) sawdust (c) table salt (d) glucose powder
27. 27.True or false: glucose powder does not dissolve in water. (a) False (b) True
28. 28.True or false: folding paper is a change that can be undone. (a) True (b) False
29. 29.True or false: melting butter is a change that cannot be undone. (a) False (b) True
30. 30.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
31. 31.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
32. 32.🧈 Which of these is a change that can be undone? (a) baking a cake (b) browning lemon ink (c) rusting iron (d) dissolving salt
33. 33.🔍 Which is the odd one out? (a) baking soda (b) chalk powder (c) food colour (d) glucose powder
34. 34.⚖️ 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) False (b) True
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a shallow dish (c) salt (d) a piece of string
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) turmeric powder (c) salt (d) a piece of string
37. 37.🧈 Which of these is a change that can be undone? (a) melting butter (b) cooking an egg (c) baking a cake (d) rusting iron
38. 38.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
39. 39.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
40. 40.True or false: small pebbles dissolves in water. (a) False (b) True

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