Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 681 · 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.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) few or no crystals (d) it turns sweet
2. 2.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) no crystals (d) smaller crystals
3. 3.True or false: dissolving salt is a change that can be undone. (a) False (b) True
4. 4.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) browning lemon ink (c) freezing water (d) melting butter
5. 5.⚖️ 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
6. 6.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sea water evaporates (c) salt rains down (d) sand is ground up
7. 7.⚖️ 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 change it (b) we measure it (c) we keep it the same
8. 8.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) folding paper (c) dissolving salt (d) baking a cake
9. 9.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
10. 10.🔍 Which is the odd one out? (a) sawdust (b) small pebbles (c) table salt (d) sand
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) salt (c) warm water (d) a piece of string
12. 12.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) the youngest child (d) nobody needs to
13. 13.⚖️ 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 amount of salt (c) days to see crystals
14. 14.⚖️ 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 amount of water (c) days to see crystals
15. 15.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
16. 16.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to make it very salty (c) to cool the water (d) to change its colour
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a mirror (d) a spoon
18. 18.🔍 Which is the odd one out? (a) sawdust (b) food colour (c) cooking oil (d) chalk powder
19. 19.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) turmeric powder (c) a mirror (d) salt
20. 20.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a magnet (c) warm water (d) salt
21. 21.🔍 Which is the odd one out? (a) sand (b) food colour (c) sugar (d) table salt
22. 22.⚖️ 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
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we keep it the same (b) we measure it (c) we change it
24. 24.⚖️ 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 same dish (c) the amount of salt (d) sunny or shady place
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a balloon (c) warm water (d) salt
26. 26.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
27. 27.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) saturated (d) frozen
28. 28.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
29. 29.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) sand (b) sawdust (c) chalk powder (d) sugar
31. 31.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
32. 32.⚖️ 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
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a balloon (c) salt (d) a piece of string
34. 34.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) melting butter (c) folding paper (d) freezing water
35. 35.True or false: baking a cake is a change that can be undone. (a) False (b) True
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
37. 37.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.⚖️ 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 keep it the same (b) we measure it (c) we change it
39. 39.🔍 Which is the odd one out? (a) chalk powder (b) baking soda (c) sawdust (d) small pebbles
40. 40.True or false: baking a cake is a change that cannot be undone. (a) True (b) False

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