Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 119 · 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 of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) a battery cell (d) warm water
2. 2.True or false: cooking oil does not dissolve in water. (a) True (b) False
3. 3.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) liquid crystals (d) no crystals
4. 4.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
5. 5.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
6. 6.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
7. 7.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
8. 8.⚖️ 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 change it (c) we keep it the same
9. 9.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) warm water (c) a shallow dish (d) a magnet
10. 10.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) empty (d) saturated
11. 11.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
12. 12.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) glucose powder (d) cooking oil
13. 13.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) sawdust (d) glucose powder
14. 14.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) yeast (c) salt (d) a balloon
15. 15.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) the youngest child (d) nobody needs to
16. 16.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
17. 17.🔍 Which is the odd one out? (a) table salt (b) sand (c) sugar (d) baking soda
18. 18.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
19. 19.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) rusting iron (c) melting butter (d) freezing water
20. 20.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
21. 21.⚖️ 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 change it (c) we keep it the same
22. 22.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
23. 23.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
24. 24.True or false: sugar dissolves in water. (a) True (b) False
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 change it (b) we keep it the same (c) we measure it
26. 26.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
27. 27.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) in a busy doorway (d) safe from small children
28. 28.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it fizzes (d) it turns sweet
29. 29.True or false: sawdust dissolves in water. (a) False (b) True
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) turmeric powder (d) warm water
31. 31.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) salt eats water (d) the dish melts
32. 32.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) warm water (c) a magnet (d) yeast
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the amount of water (c) sunny or shady place (d) the kind of salt
34. 34.True or false: chalk powder does not dissolve in water. (a) False (b) True
35. 35.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
36. 36.True or false: melting butter is a change that cannot be undone. (a) False (b) True
37. 37.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
38. 38.⚖️ 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 measure it (c) we change it
39. 39.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
40. 40.⚖️ 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) the amount of water (d) the same dish

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