Salt Crystal Experiment Worksheet

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

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