Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 355 · 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.⚖️ 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 change it (b) we measure it (c) we keep it the same
2. 2.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a battery cell (c) a mirror (d) turmeric powder
3. 3.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
4. 4.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) safe from small children (d) in a busy doorway
5. 5.True or false: folding paper is a change that cannot be undone. (a) True (b) False
6. 6.True or false: baking soda does not dissolve in water. (a) True (b) False
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
8. 8.⚖️ 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 change it (c) we measure it
9. 9.⚖️ 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) days to see crystals (c) the amount of salt
10. 10.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) rusting iron (d) folding paper
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) False (b) True
12. 12.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) sugar (d) chalk powder
13. 13.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
14. 14.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) nobody needs to (d) a friend who is running
15. 15.⚖️ 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 amount of water (b) days to see crystals (c) sunny or shady place
16. 16.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
17. 17.🧂 Which of these dissolves in water? (a) sawdust (b) chalk powder (c) sand (d) table salt
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 the one thing we change. (a) True (b) False
19. 19.🔍 Which is the odd one out? (a) sugar (b) table salt (c) food colour (d) chalk powder
20. 20.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) yeast (c) a spoon (d) warm water
21. 21.⚖️ 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
22. 22.True or false: melting butter is a change that cannot be undone. (a) True (b) False
23. 23.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) no crystals (d) liquid crystals
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) turmeric powder (c) warm water (d) salt
25. 25.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
26. 26.True or false: sand dissolves in water. (a) True (b) False
27. 27.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a magnet (d) a shallow dish
28. 28.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
29. 29.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
30. 30.⚖️ 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 amount of salt (b) the kind of salt (c) the same dish (d) days to see crystals
31. 31.🔍 Which is the odd one out? (a) baking soda (b) sugar (c) food colour (d) small pebbles
32. 32.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
33. 33.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
34. 34.⚖️ 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) sunny or shady place (c) the same dish (d) days to see crystals
35. 35.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) a spoon (d) a battery cell
36. 36.True or false: melting ice is a change that can be undone. (a) False (b) True
37. 37.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) yeast (c) a magnet (d) salt
38. 38.True or false: chalk powder does not dissolve in water. (a) True (b) False
39. 39.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
40. 40.🧂 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

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