Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 773 · 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 a change that can be undone? (a) browning lemon ink (b) freezing water (c) cooking an egg (d) milk turning to curd
2. 2.⚖️ 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
3. 3.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
4. 4.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) a piece of string (c) salt (d) a shallow dish
6. 6.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a spoon (d) turmeric powder
8. 8.True or false: chalk powder dissolves in water. (a) False (b) True
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) True (b) False
10. 10.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
11. 11.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
12. 12.⚖️ 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
13. 13.🧂 Which of these dissolves in water? (a) glucose powder (b) cooking oil (c) sand (d) chalk powder
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a piece of string (d) a balloon
15. 15.🔍 Which is the odd one out? (a) food colour (b) small pebbles (c) glucose powder (d) sugar
16. 16.⚖️ 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 change it (b) we keep it the same (c) we measure it
17. 17.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) salt (c) a magnet (d) turmeric powder
18. 18.True or false: folding paper is a change that cannot be undone. (a) True (b) False
19. 19.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) baking a cake (c) melting ice (d) dissolving salt
20. 20.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a magnet (c) yeast (d) a balloon
21. 21.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
22. 22.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
23. 23.🔍 Which is the odd one out? (a) small pebbles (b) baking soda (c) cooking oil (d) sand
24. 24.True or false: table salt dissolves in water. (a) True (b) False
25. 25.⚖️ 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
26. 26.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
27. 27.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) salt (d) a battery cell
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) True (b) False
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) days to see crystals (b) the same dish (c) the amount of salt (d) the amount of water
31. 31.🧂 Which of these dissolves in water? (a) cooking oil (b) food colour (c) small pebbles (d) sand
32. 32.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
33. 33.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) table salt (d) sand
34. 34.🔮 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
35. 35.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) no crystals (d) liquid crystals
36. 36.⚖️ 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
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) yeast (c) salt (d) warm water
38. 38.🧂 Which of these does not dissolve in water? (a) food colour (b) glucose powder (c) chalk powder (d) sugar
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a mirror (d) salt
40. 40.True or false: cooking oil does not dissolve in water. (a) False (b) True

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