Salt Crystal Experiment Worksheet

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

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