Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 763 · 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.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
2. 2.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) no crystals (d) bigger crystals
3. 3.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a piece of string (c) a shallow dish (d) a magnet
4. 4.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
5. 5.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) nobody needs to (d) the youngest child
6. 6.⚖️ 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) False (b) True
7. 7.True or false: sugar does not dissolve in water. (a) False (b) True
8. 8.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
9. 9.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) empty (c) magnetic (d) frozen
10. 10.🧂 Which of these does not dissolve in water? (a) table salt (b) food colour (c) cooking oil (d) glucose powder
11. 11.⚖️ 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) the same dish (d) days to see crystals
12. 12.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
13. 13.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) melting butter (c) melting ice (d) dissolving salt
14. 14.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
15. 15.True or false: baking soda does not dissolve in water. (a) False (b) True
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a shallow dish (c) warm water (d) a spoon
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
18. 18.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
19. 19.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) salt (d) a magnet
21. 21.⚖️ 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 change it (b) we measure it (c) we keep it the same
22. 22.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the same dish
24. 24.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
25. 25.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) table salt (d) sand
26. 26.🧂 Which of these does not dissolve in water? (a) sugar (b) small pebbles (c) glucose powder (d) food colour
27. 27.🧈 Which of these is a change that can be undone? (a) melting ice (b) rusting iron (c) milk turning to curd (d) cooking an egg
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) yeast (d) warm water
29. 29.⚖️ 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
30. 30.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
31. 31.⚖️ 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 same dish (b) the amount of salt (c) the kind of salt (d) days to see crystals
32. 32.True or false: table salt does not dissolve in water. (a) True (b) False
33. 33.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
34. 34.⚖️ 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 change it (c) we keep it the same
35. 35.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
36. 36.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
37. 37.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
38. 38.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
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.🧂 Which of these does not dissolve in water? (a) sugar (b) food colour (c) glucose powder (d) sawdust

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