Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 744 · 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: browning lemon ink is a change that cannot be undone. (a) True (b) False
2. 2.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
3. 3.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) browning lemon ink (d) melting butter
4. 4.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) no crystals (d) liquid crystals
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) salt (d) a balloon
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the amount of salt (c) sunny or shady place (d) the kind of salt
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 keep it the same (b) we change it (c) we measure it
8. 8.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a piece of string (c) a battery cell (d) a balloon
9. 9.⚖️ 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 keep it the same (b) we change it (c) we measure it
10. 10.⚖️ 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 keep it the same (b) we measure it (c) we change it
11. 11.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) it turns sweet (d) few or no crystals
12. 12.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
13. 13.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
14. 14.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
15. 15.True or false: melting butter is a change that can be undone. (a) False (b) True
16. 16.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) turmeric powder (d) a piece of string
18. 18.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a battery cell (c) a shallow dish (d) a spoon
19. 19.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
20. 20.🔍 Which is the odd one out? (a) small pebbles (b) sawdust (c) sugar (d) cooking oil
21. 21.⚖️ 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
22. 22.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
23. 23.🔍 Which is the odd one out? (a) sand (b) sawdust (c) small pebbles (d) food colour
24. 24.🧈 Which of these is a change that can be undone? (a) folding paper (b) milk turning to curd (c) rusting iron (d) cooking an egg
25. 25.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) warm water (c) a balloon (d) a battery cell
26. 26.⚖️ 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
27. 27.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) on the edge of a table (d) next to the baby
28. 28.🧂 Which of these dissolves in water? (a) sugar (b) small pebbles (c) chalk powder (d) sand
29. 29.🛟 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
30. 30.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
31. 31.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
32. 32.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) salt crystals form (d) it turns to oil
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) turmeric powder (c) warm water (d) a spoon
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a magnet (d) a spoon
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a mirror (d) a spoon
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the amount of salt
37. 37.True or false: food colour dissolves in water. (a) True (b) False
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a spoon (d) a battery cell
39. 39.True or false: freezing water is a change that cannot be undone. (a) False (b) True
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) salt (d) a magnet

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