Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 481 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a spoon (d) a balloon
2. 2.🧂 Which of these dissolves in water? (a) table salt (b) chalk powder (c) sand (d) sawdust
3. 3.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
4. 4.⚖️ 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) False (b) True
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a spoon (d) a battery cell
6. 6.⚖️ 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
7. 7.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
8. 8.⚖️ 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) days to see crystals (b) the same dish (c) the amount of salt (d) sunny or shady place
9. 9.True or false: freezing water is a change that can be undone. (a) True (b) False
10. 10.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a spoon (c) a magnet (d) a balloon
11. 11.🔍 Which is the odd one out? (a) sand (b) food colour (c) small pebbles (d) cooking oil
12. 12.🧂 Which of these dissolves in water? (a) sawdust (b) cooking oil (c) sand (d) food colour
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) True (b) False
14. 14.True or false: sugar does not dissolve in water. (a) False (b) True
15. 15.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) cooking oil (d) sugar
16. 16.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to cool the water (d) to make it fizz
17. 17.🧂 Which of these does not dissolve in water? (a) sugar (b) food colour (c) table salt (d) cooking oil
18. 18.True or false: glucose powder dissolves in water. (a) False (b) True
19. 19.🔍 Which is the odd one out? (a) glucose powder (b) food colour (c) sand (d) table salt
20. 20.⚖️ 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 same dish (c) the kind of salt (d) the amount of salt
21. 21.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) browning lemon ink (d) folding paper
22. 22.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
23. 23.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
24. 24.True or false: melting butter is a change that can be undone. (a) False (b) True
25. 25.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) the dish melts (d) salt eats water
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 salt”? (a) we measure it (b) we keep it the same (c) we change it
27. 27.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) cooking an egg (d) freezing water
28. 28.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a magnet (c) warm water (d) yeast
29. 29.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
30. 30.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) freezing water (c) browning lemon ink (d) melting ice
31. 31.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
32. 32.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
33. 33.True or false: a shallow dish is not 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? True or false: the amount of salt is what we measure. (a) False (b) True
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a magnet (d) salt
36. 36.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.⚖️ 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
38. 38.⚖️ 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
39. 39.⚖️ 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 water
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False

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