Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 732 · 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? What do we do with “days to see crystals”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.🧂 Which of these dissolves in water? (a) sawdust (b) glucose powder (c) chalk powder (d) sand
3. 3.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) a shallow dish (c) warm water (d) a piece of string
4. 4.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
5. 5.⚖️ 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 keep it the same (b) we change it (c) we measure it
6. 6.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) crystals grow faster (d) few or no crystals
8. 8.True or false: freezing water is a change that can be undone. (a) False (b) True
9. 9.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
10. 10.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) cooking oil (d) food colour
11. 11.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
12. 12.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) rusting iron (c) cooking an egg (d) dissolving salt
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) turmeric powder (d) salt
14. 14.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
15. 15.🔍 Which is the odd one out? (a) small pebbles (b) table salt (c) food colour (d) sugar
16. 16.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a piece of string (d) a magnet
18. 18.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
19. 19.True or false: rusting iron is a change that can be undone. (a) True (b) False
20. 20.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny triangles (d) tiny stars
21. 21.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
22. 22.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) magnetic (d) empty
23. 23.⚖️ 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) False (b) True
24. 24.🛟 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
25. 25.True or false: sand dissolves in water. (a) False (b) True
26. 26.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
27. 27.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of salt (b) the same dish (c) sunny or shady place (d) days to see crystals
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) False (b) True
30. 30.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) sugar crystals form (d) it turns to oil
31. 31.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) food colour (d) small pebbles
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a spoon (c) a shallow dish (d) salt
33. 33.⚖️ 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
34. 34.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) safe from small children (d) on the edge of a table
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) warm water (d) a battery cell
36. 36.⚖️ 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) days to see crystals (c) the amount of salt
37. 37.True or false: chalk powder does not dissolve in water. (a) False (b) True
38. 38.🔍 Which is the odd one out? (a) small pebbles (b) cooking oil (c) chalk powder (d) sugar
39. 39.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) salt (c) yeast (d) a battery cell
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a battery cell (c) a shallow dish (d) salt

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