Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 511 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) a balloon (d) salt
2. 2.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
3. 3.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
4. 4.⚖️ 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) the amount of salt (c) days to see crystals
5. 5.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) salt crystals form (d) it turns to oil
6. 6.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) sawdust (d) cooking oil
7. 7.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) crystals grow faster (d) it fizzes
8. 8.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
9. 9.⚖️ 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
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) sunny or shady place (c) the same dish (d) the amount of water
11. 11.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) turmeric powder (d) a piece of string
13. 13.True or false: cooking an egg is a change that can be undone. (a) False (b) True
14. 14.True or false: salt is not needed for growing salt crystals. (a) True (b) False
15. 15.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
16. 16.🧂 Which of these does not dissolve in water? (a) food colour (b) small pebbles (c) glucose powder (d) baking soda
17. 17.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a friend who is running (d) a grown-up
18. 18.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) melting butter (d) browning lemon ink
19. 19.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it fizz (d) to make it very salty
20. 20.⚖️ 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) the same dish (c) days to see crystals
21. 21.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
22. 22.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
23. 23.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) salt eats water (d) the dish melts
24. 24.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) frozen (d) saturated
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 change it (c) we measure it
26. 26.🧂 Which of these dissolves in water? (a) glucose powder (b) small pebbles (c) cooking oil (d) sawdust
27. 27.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) warm water (d) turmeric powder
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False
29. 29.True or false: sawdust does not dissolve in water. (a) True (b) False
30. 30.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
31. 31.🧈 Which of these is a change that can be undone? (a) freezing water (b) cooking an egg (c) browning lemon ink (d) rusting iron
32. 32.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) fish make it (c) salt rains down (d) sea water evaporates
33. 33.True or false: sand does not dissolve in water. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) sawdust (b) food colour (c) small pebbles (d) sand
35. 35.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) a piece of string (d) a mirror
36. 36.🧂 Which of these does not dissolve in water? (a) chalk powder (b) glucose powder (c) sugar (d) table salt
37. 37.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a spoon (c) a magnet (d) yeast
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 salt”? (a) we measure it (b) we keep it the same (c) we change it
39. 39.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) baking a cake (d) folding paper
40. 40.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone

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