Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 270 · 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: sawdust dissolves in water. (a) True (b) False
2. 2.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
3. 3.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
4. 4.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) bigger crystals (d) no crystals
5. 5.True or false: glucose powder dissolves in water. (a) False (b) True
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a battery cell (c) a spoon (d) salt
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) salt (d) a magnet
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False
9. 9.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
10. 10.True or false: baking soda dissolves in water. (a) False (b) True
11. 11.True or false: salt is not needed for growing salt crystals. (a) False (b) True
12. 12.True or false: small pebbles does not dissolve in water. (a) False (b) True
13. 13.🧂 Which of these does not dissolve in water? (a) table salt (b) sand (c) food colour (d) glucose powder
14. 14.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) crystals grow faster (d) few or no crystals
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) True (b) False
16. 16.True or false: sand does not dissolve in water. (a) True (b) False
17. 17.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) freezing water (d) browning lemon ink
18. 18.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
19. 19.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
20. 20.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
21. 21.🧂 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 very salty (d) to make it fizz
22. 22.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) a friend who is running (d) nobody needs to
23. 23.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) cooking oil (d) baking soda
24. 24.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) next to the baby (d) in a busy doorway
25. 25.True or false: freezing water is a change that cannot be undone. (a) False (b) True
26. 26.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) yeast (d) a piece of string
28. 28.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
29. 29.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) melting butter (d) rusting iron
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) warm water (c) a shallow dish (d) a piece of string
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) True (b) False
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) a spoon (d) a balloon
33. 33.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
34. 34.⚖️ 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
35. 35.True or false: yeast is needed for growing salt crystals. (a) False (b) True
36. 36.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
37. 37.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to oil (c) salt crystals form (d) it turns to butter
38. 38.True or false: folding paper is a change that can be undone. (a) False (b) True
39. 39.True or false: milk turning to curd is a change that cannot be undone. (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 the one thing we change? (a) sunny or shady place (b) the amount of salt (c) the amount of water (d) the same dish

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