Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 362 · 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 “days to see crystals”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.⚖️ 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) sunny or shady place (b) the amount of salt (c) the kind of salt (d) the amount of water
3. 3.True or false: chalk powder dissolves in water. (a) True (b) False
4. 4.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
5. 5.⚖️ 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
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a spoon (c) a piece of string (d) a shallow dish
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
8. 8.⚖️ 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) False (b) True
9. 9.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) melting butter (c) folding paper (d) freezing water
10. 10.⚖️ 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) days to see crystals (c) the same dish (d) the kind of salt
11. 11.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
12. 12.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
13. 13.🧂 Which of these does not dissolve in water? (a) glucose powder (b) small pebbles (c) table salt (d) sugar
14. 14.True or false: table salt dissolves in water. (a) False (b) True
15. 15.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
16. 16.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) the dish melts (d) salt grows roots
17. 17.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) it fizzes (d) crystals grow faster
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 kept the same. (a) True (b) False
19. 19.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
20. 20.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a shallow dish (c) turmeric powder (d) a balloon
21. 21.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
22. 22.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
23. 23.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
24. 24.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a balloon (c) yeast (d) salt
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a battery cell (c) a piece of string (d) salt
26. 26.🧈 Which of these is a change that can be undone? (a) baking a cake (b) folding paper (c) rusting iron (d) cooking an egg
27. 27.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
28. 28.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) baking soda (d) cooking oil
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) a piece of string (d) turmeric powder
30. 30.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a spoon (d) a battery cell
32. 32.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
33. 33.🧂 Which of these dissolves in water? (a) food colour (b) sand (c) small pebbles (d) chalk powder
34. 34.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) browning lemon ink (c) dissolving salt (d) melting ice
35. 35.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
36. 36.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.🔍 Which is the odd one out? (a) sawdust (b) sugar (c) table salt (d) food colour
38. 38.🧂 Which of these dissolves in water? (a) sugar (b) cooking oil (c) sand (d) chalk powder
39. 39.⚖️ 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
40. 40.🔍 Which is the odd one out? (a) baking soda (b) sand (c) chalk powder (d) sawdust

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