Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 117 · 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? True or false: sunny or shady place is the one thing we change. (a) False (b) True
2. 2.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) milk turning to curd (d) freezing water
3. 3.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
4. 4.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
5. 5.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
6. 6.⚖️ 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 keep it the same (b) we measure it (c) we change it
7. 7.🔍 Which is the odd one out? (a) cooking oil (b) sawdust (c) sand (d) baking soda
8. 8.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) baking a cake (c) freezing water (d) rusting iron
9. 9.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
10. 10.⚖️ 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 water
11. 11.🛟 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
12. 12.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) salt grows roots (d) water evaporates
13. 13.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it fizzes (d) it turns sweet
14. 14.🔍 Which is the odd one out? (a) food colour (b) table salt (c) sawdust (d) sugar
15. 15.⚖️ 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 change it (c) we keep it the same
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a spoon (c) salt (d) a shallow dish
17. 17.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
18. 18.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
19. 19.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
20. 20.🧈 Which of these is a change that can be undone? (a) baking a cake (b) melting ice (c) rusting iron (d) milk turning to curd
21. 21.🧂 Which of these dissolves in water? (a) cooking oil (b) glucose powder (c) small pebbles (d) sawdust
22. 22.True or false: sugar dissolves in water. (a) False (b) True
23. 23.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) melting butter (d) browning lemon ink
24. 24.🧂 Which of these dissolves in water? (a) cooking oil (b) sand (c) small pebbles (d) baking soda
25. 25.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
26. 26.⚖️ 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
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) salt (c) a piece of string (d) a shallow dish
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
29. 29.True or false: melting butter is a change that can be undone. (a) True (b) False
30. 30.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) rusting iron (c) baking a cake (d) dissolving salt
31. 31.🔍 Which is the odd one out? (a) glucose powder (b) sand (c) baking soda (d) table salt
32. 32.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) baking a cake (c) melting ice (d) dissolving salt
33. 33.🧂 Which of these dissolves in water? (a) chalk powder (b) food colour (c) cooking oil (d) sawdust
34. 34.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) bigger crystals (d) liquid crystals
35. 35.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) saturated (c) empty (d) magnetic
36. 36.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
37. 37.True or false: cooking oil dissolves in water. (a) False (b) True
38. 38.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) on the edge of a table (d) next to the baby

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