Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 216 · 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.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) saturated (d) empty
2. 2.True or false: melting ice is a change that cannot be undone. (a) False (b) True
3. 3.⚖️ 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
4. 4.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
5. 5.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
6. 6.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
7. 7.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
8. 8.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
9. 9.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
10. 10.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) baking a cake (c) cooking an egg (d) dissolving salt
11. 11.True or false: table salt dissolves in water. (a) False (b) True
12. 12.⚖️ 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 measure it (c) we keep it the same
13. 13.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a balloon (c) a magnet (d) yeast
14. 14.⚖️ 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 same dish (c) the amount of salt (d) the amount of water
15. 15.⚖️ 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) False (b) True
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) turmeric powder (c) a piece of string (d) warm water
17. 17.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
18. 18.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
19. 19.🛟 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
20. 20.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) it fizzes (d) crystals grow faster
21. 21.True or false: cooking oil dissolves in water. (a) False (b) True
22. 22.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) small pebbles (d) table salt
23. 23.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) sugar crystals form (d) salt crystals form
24. 24.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
25. 25.⚖️ 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 kind of salt (c) the amount of salt (d) sunny or shady place
26. 26.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a spoon (c) warm water (d) a piece of string
28. 28.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a battery cell (c) a piece of string (d) salt
30. 30.True or false: baking soda dissolves in water. (a) True (b) False
31. 31.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) warm water (d) a mirror
32. 32.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) small pebbles (d) sugar
33. 33.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
34. 34.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) rusting iron (d) folding paper
35. 35.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
36. 36.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) no crystals (d) bigger crystals
37. 37.🧂 Which of these dissolves in water? (a) food colour (b) small pebbles (c) sawdust (d) sand
38. 38.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
39. 39.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) browning lemon ink (c) milk turning to curd (d) melting butter
40. 40.True or false: chalk powder does not dissolve in water. (a) False (b) True

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