Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 256 · 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: baking a cake? (a) can be undone (b) cannot be undone
2. 2.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it fizz (c) to cool the water (d) to make it very salty
3. 3.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) in a busy doorway (d) next to the baby
4. 4.🔍 Which is the odd one out? (a) sugar (b) sawdust (c) sand (d) small pebbles
5. 5.⚖️ 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 same dish (b) the kind of salt (c) the amount of water (d) sunny or shady place
6. 6.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
7. 7.🧂 Which of these dissolves in water? (a) cooking oil (b) sand (c) table salt (d) chalk powder
8. 8.🔍 Which is the odd one out? (a) sand (b) sawdust (c) table salt (d) chalk powder
9. 9.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) the dish melts (d) salt grows roots
10. 10.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
11. 11.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) baking a cake (c) rusting iron (d) melting butter
12. 12.⚖️ 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) sunny or shady place (c) days to see crystals (d) the amount of water
13. 13.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) glucose powder (d) sawdust
14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the kind of salt (b) days to see crystals (c) sunny or shady place
15. 15.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) salt (d) turmeric powder
17. 17.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a magnet (c) a battery cell (d) yeast
18. 18.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) sugar crystals form (d) it turns to butter
19. 19.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) bigger crystals (d) liquid crystals
20. 20.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
21. 21.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
22. 22.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
23. 23.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it fizzes (c) crystals grow faster (d) it turns sweet
24. 24.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) warm water (c) a shallow dish (d) salt
25. 25.⚖️ 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 keep it the same (b) we measure it (c) we change it
26. 26.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
27. 27.True or false: cooking an egg is a change that can be undone. (a) True (b) False
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a mirror (d) warm water
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
30. 30.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
31. 31.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
32. 32.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
33. 33.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
34. 34.⚖️ 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
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
36. 36.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
37. 37.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
38. 38.⚖️ 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
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
40. 40.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone

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