Salt Crystal Experiment Worksheet

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

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