Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 155 · 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: folding paper? (a) can be undone (b) cannot be undone
2. 2.🧂 Which of these dissolves in water? (a) cooking oil (b) sawdust (c) sugar (d) chalk powder
3. 3.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny cubes (c) tiny stars (d) tiny triangles
4. 4.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) sugar (d) small pebbles
5. 5.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a magnet (d) warm water
7. 7.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to make it fizz (d) to cool the water
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) yeast (c) a piece of string (d) warm water
9. 9.🛟 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
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
11. 11.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt eats water (d) salt grows roots
12. 12.🔍 Which is the odd one out? (a) food colour (b) sand (c) cooking oil (d) chalk powder
13. 13.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) crystals grow faster (d) it turns sweet
14. 14.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
15. 15.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
16. 16.True or false: small pebbles dissolves in water. (a) False (b) True
17. 17.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) bigger crystals (d) no crystals
18. 18.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
19. 19.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) salt (c) a spoon (d) a shallow dish
21. 21.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) it turns to oil (d) sugar crystals form
22. 22.True or false: cooking oil does not dissolve in water. (a) False (b) True
23. 23.True or false: food colour does not dissolve in water. (a) False (b) True
24. 24.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
25. 25.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
26. 26.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
27. 27.⚖️ 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
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) salt (d) a mirror
29. 29.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
30. 30.⚖️ 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 keep it the same (b) we change it (c) we measure it
31. 31.⚖️ 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 salt
32. 32.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a balloon (c) a piece of string (d) warm water
34. 34.⚖️ 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 same dish (b) days to see crystals (c) sunny or shady place
35. 35.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a spoon (c) warm water (d) a mirror
36. 36.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) folding paper (c) browning lemon ink (d) melting ice
37. 37.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
38. 38.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
39. 39.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) a shallow dish (d) turmeric powder

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