Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 613 · 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: melting butter? (a) cannot be undone (b) can be undone
2. 2.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
3. 3.⚖️ 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) True (b) False
4. 4.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
5. 5.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
6. 6.🧂 Which of these dissolves in water? (a) sand (b) food colour (c) cooking oil (d) sawdust
7. 7.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) turmeric powder (d) a shallow dish
8. 8.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
9. 9.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to cool the water (c) to change its colour (d) to make it fizz
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (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.True or false: baking soda does not dissolve in water. (a) True (b) False
13. 13.True or false: melting butter is a change that can be undone. (a) False (b) True
14. 14.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) no crystals (d) bigger crystals
15. 15.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) baking soda (d) sawdust
16. 16.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
17. 17.⚖️ 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) days to see crystals (b) the amount of salt (c) the amount of water (d) sunny or shady place
18. 18.True or false: salt is not needed for growing salt crystals. (a) True (b) False
19. 19.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
20. 20.True or false: folding paper is a change that cannot be undone. (a) True (b) False
21. 21.True or false: table salt does not dissolve in water. (a) True (b) False
22. 22.⚖️ 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 measure it (b) we change it (c) we keep it the same
23. 23.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) salt crystals form (d) sugar crystals form
24. 24.True or false: cooking oil does not dissolve in water. (a) True (b) False
25. 25.True or false: baking soda dissolves in water. (a) True (b) False
26. 26.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
27. 27.⚖️ 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 change it (b) we keep it the same (c) we measure it
28. 28.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) baking soda (d) sand
29. 29.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
30. 30.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
31. 31.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
32. 32.⚖️ 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 change it (b) we measure it (c) we keep it the same
33. 33.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a piece of string (c) a spoon (d) salt
35. 35.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it fizzes (d) it turns sweet
36. 36.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
37. 37.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a mirror (c) a balloon (d) warm water
38. 38.⚖️ 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 kind of salt (b) the amount of water (c) sunny or shady place (d) days to see crystals
39. 39.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
40. 40.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed

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