Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 768 · 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: freezing water is a change that cannot be undone. (a) False (b) True
2. 2.⚖️ 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 kind of salt (b) days to see crystals (c) sunny or shady place
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 the one thing we change. (a) True (b) False
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) turmeric powder (c) warm water (d) a shallow dish
5. 5.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) bigger crystals (d) smaller crystals
6. 6.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.⚖️ 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 keep it the same (c) we change it
8. 8.True or false: glucose powder does not dissolve in water. (a) True (b) False
9. 9.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it fizz (c) to make it very salty (d) to cool the water
10. 10.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) on the edge of a table (d) in a busy doorway
11. 11.⚖️ 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) the same dish (c) days to see crystals
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) yeast (d) a shallow dish
13. 13.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a battery cell (c) warm water (d) a balloon
14. 14.True or false: baking soda does not dissolve in water. (a) True (b) False
15. 15.🔍 Which is the odd one out? (a) glucose powder (b) table salt (c) baking soda (d) cooking oil
16. 16.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) True (b) False
18. 18.⚖️ 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
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the amount of salt (c) days to see crystals (d) the kind of salt
20. 20.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
21. 21.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
22. 22.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) folding paper (c) dissolving salt (d) browning lemon ink
23. 23.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) saturated (d) magnetic
24. 24.🧂 Which of these dissolves in water? (a) cooking oil (b) sawdust (c) table salt (d) small pebbles
25. 25.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
26. 26.True or false: chalk powder does not dissolve in water. (a) True (b) False
27. 27.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
28. 28.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
29. 29.⚖️ 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) True (b) False
30. 30.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
31. 31.⚖️ 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 measure it (c) we keep it the same
32. 32.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
33. 33.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) chalk powder (d) food colour
34. 34.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
35. 35.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) warm water (c) salt (d) a spoon
37. 37.True or false: freezing water is a change that can be undone. (a) False (b) True
38. 38.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a mirror (c) a piece of string (d) a magnet
39. 39.True or false: melting butter 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) the amount of salt (b) the amount of water (c) the same dish (d) sunny or shady place

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