Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 105 · 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.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
2. 2.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
3. 3.⚖️ 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 keep it the same (b) we change it (c) we measure it
4. 4.⚖️ 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
5. 5.⚖️ 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 amount of water (c) the kind of salt (d) days to see crystals
6. 6.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
7. 7.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) it fizzes (d) crystals grow faster
8. 8.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
9. 9.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) folding paper (c) freezing water (d) melting butter
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a piece of string (d) a mirror
11. 11.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
12. 12.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) a balloon (d) a spoon
13. 13.⚖️ 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) sunny or shady place (b) the kind of salt (c) days to see crystals (d) the same dish
14. 14.🧂 Which of these does not dissolve in water? (a) chalk powder (b) table salt (c) glucose powder (d) sugar
15. 15.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to make it very salty (d) to change its colour
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a shallow dish (c) salt (d) a piece of string
17. 17.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) the dish melts (d) salt eats water
18. 18.True or false: folding paper is a change that cannot be undone. (a) True (b) False
19. 19.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) in a busy doorway (d) on the edge of a table
20. 20.True or false: salt is not needed for growing salt crystals. (a) True (b) False
21. 21.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
22. 22.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
23. 23.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
24. 24.True or false: sawdust dissolves in water. (a) False (b) True
25. 25.True or false: sawdust does not dissolve in water. (a) False (b) True
26. 26.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
27. 27.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to oil (c) salt crystals form (d) it turns to butter
28. 28.⚖️ 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 amount of water
29. 29.🔍 Which is the odd one out? (a) cooking oil (b) small pebbles (c) sawdust (d) sugar
30. 30.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
31. 31.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) turmeric powder (c) a mirror (d) a balloon
32. 32.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) saturated (d) frozen
33. 33.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) salt (c) warm water (d) a shallow dish
34. 34.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
35. 35.True or false: baking soda does not dissolve in water. (a) False (b) True
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a magnet (d) a shallow dish
37. 37.🛟 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
38. 38.⚖️ 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) the kind of salt (c) sunny or shady place
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a battery cell (d) a piece of string
40. 40.⚖️ 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) False (b) True

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