Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 726 · 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) glucose powder (b) small pebbles (c) cooking oil (d) sand
2. 2.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
3. 3.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) the dish melts (d) water evaporates
4. 4.True or false: sand does not dissolve in water. (a) False (b) True
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) salt (d) yeast
6. 6.True or false: table salt does not dissolve in water. (a) False (b) True
7. 7.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) frozen (d) saturated
8. 8.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) rusting iron (c) melting ice (d) cooking an egg
9. 9.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
10. 10.True or false: chalk powder dissolves in water. (a) True (b) False
11. 11.⚖️ 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 keep it the same (c) we measure it
12. 12.🛟 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
13. 13.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) dissolving salt (d) cooking an egg
14. 14.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) bigger crystals (d) liquid crystals
15. 15.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) a battery cell (c) a magnet (d) a mirror
16. 16.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) melting ice (d) rusting iron
17. 17.⚖️ 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
18. 18.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
19. 19.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) fish make it (c) salt rains down (d) sand is ground up
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a magnet (d) warm water
22. 22.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
23. 23.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
24. 24.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) a piece of string (c) salt (d) warm water
25. 25.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
26. 26.⚖️ 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 measure it (b) we change it (c) we keep it the same
27. 27.🧈 Which of these is a change that can be undone? (a) rusting iron (b) folding paper (c) cooking an egg (d) milk turning to curd
28. 28.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) a battery cell (d) warm water
29. 29.🧂 Which of these does not dissolve in water? (a) glucose powder (b) small pebbles (c) table salt (d) sugar
30. 30.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) melting butter (d) baking a cake
31. 31.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) sand (d) glucose powder
32. 32.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to oil (d) it turns to butter
33. 33.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) glucose powder (d) small pebbles
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) warm water (c) a shallow dish (d) salt
35. 35.⚖️ 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
36. 36.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
37. 37.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.⚖️ 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) True (b) False
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) salt (d) a mirror

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