Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 669 · 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.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) warm water (d) yeast
2. 2.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
3. 3.True or false: folding paper is a change that can be undone. (a) False (b) True
4. 4.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) cooking oil (d) food colour
5. 5.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a spoon (d) a battery cell
7. 7.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) cooking oil (b) table salt (c) sawdust (d) chalk powder
9. 9.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) food colour (d) small pebbles
10. 10.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
11. 11.⚖️ 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 keep it the same (b) we measure it (c) we change it
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a shallow dish (d) a balloon
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) days to see crystals (c) the kind of salt
14. 14.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) water evaporates (d) salt grows roots
15. 15.True or false: melting butter is a change that can be undone. (a) False (b) True
16. 16.🧂 Which of these dissolves in water? (a) table salt (b) cooking oil (c) chalk powder (d) sand
17. 17.⚖️ 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) False (b) True
18. 18.True or false: yeast is needed for growing salt crystals. (a) True (b) False
19. 19.⚖️ 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 measure it (c) we change it
20. 20.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
21. 21.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) food colour (d) sawdust
22. 22.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) bigger crystals (d) no crystals
23. 23.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
24. 24.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) rusting iron (c) baking a cake (d) browning lemon ink
25. 25.🧈 Which of these is a change that can be undone? (a) baking a cake (b) milk turning to curd (c) melting butter (d) rusting iron
26. 26.⚖️ 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) the kind of salt (c) days to see crystals (d) the amount of salt
27. 27.🧂 Which of these dissolves in water? (a) cooking oil (b) baking soda (c) sawdust (d) small pebbles
28. 28.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a piece of string (c) yeast (d) turmeric powder
29. 29.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
30. 30.True or false: food colour dissolves in water. (a) False (b) True
31. 31.True or false: salt is not needed for growing salt crystals. (a) True (b) False
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) salt (d) a balloon
33. 33.⚖️ 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 change it (c) we measure it
34. 34.⚖️ 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) sunny or shady place (c) days to see crystals
35. 35.🔍 Which is the odd one out? (a) sawdust (b) chalk powder (c) cooking oil (d) sugar
36. 36.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.True or false: sawdust dissolves in water. (a) True (b) False
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) a magnet (d) salt
39. 39.True or false: warm water is needed for growing salt crystals. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) cooking oil (b) glucose powder (c) sugar (d) baking soda

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