Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 682 · 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.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
2. 2.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) saturated (c) magnetic (d) empty
3. 3.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) sawdust (d) table salt
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) salt (c) a piece of string (d) warm water
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
6. 6.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
7. 7.⚖️ 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 keep it the same (c) we change it
8. 8.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
9. 9.🔍 Which is the odd one out? (a) chalk powder (b) sugar (c) sand (d) small pebbles
10. 10.True or false: chalk powder does not dissolve in water. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) table salt (b) sawdust (c) chalk powder (d) sand
12. 12.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) salt (c) a piece of string (d) warm water
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the kind of salt (c) days to see crystals
14. 14.True or false: small pebbles does not dissolve in water. (a) True (b) False
15. 15.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
16. 16.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) salt crystals form (d) it turns to oil
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) a spoon (d) a battery cell
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) True (b) False
19. 19.🧂 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
20. 20.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) salt (d) turmeric powder
22. 22.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) in a busy doorway (d) next to the baby
23. 23.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
24. 24.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
25. 25.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
26. 26.🧂 Which of these dissolves in water? (a) glucose powder (b) chalk powder (c) sawdust (d) sand
27. 27.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
28. 28.🧂 Which of these dissolves in water? (a) sand (b) sugar (c) sawdust (d) chalk powder
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) True (b) False
30. 30.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a battery cell (c) yeast (d) a piece of string
31. 31.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) baking a cake (c) folding paper (d) melting butter
32. 32.True or false: freezing water is a change that cannot be undone. (a) False (b) True
33. 33.True or false: dissolving salt is a change that can be undone. (a) True (b) False
34. 34.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
35. 35.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) melting ice (c) melting butter (d) freezing water
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
37. 37.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) baking a cake (c) melting butter (d) rusting iron
38. 38.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
39. 39.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
40. 40.True or false: sugar dissolves in water. (a) True (b) False

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