Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 569 · 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 is the odd one out? (a) glucose powder (b) chalk powder (c) table salt (d) baking soda
2. 2.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) no crystals (d) liquid crystals
3. 3.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
4. 4.🔍 Which is the odd one out? (a) sugar (b) sand (c) table salt (d) food colour
5. 5.True or false: cooking oil does not dissolve in water. (a) True (b) False
6. 6.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) baking a cake (c) freezing water (d) cooking an egg
7. 7.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
8. 8.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a piece of string (c) a battery cell (d) turmeric powder
9. 9.⚖️ 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
10. 10.True or false: freezing water is a change that cannot 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 kind of salt”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
13. 13.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
14. 14.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
15. 15.⚖️ 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 amount of water (c) days to see crystals (d) sunny or shady place
16. 16.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
17. 17.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
18. 18.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
19. 19.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
20. 20.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
21. 21.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) salt (d) a battery cell
23. 23.⚖️ 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 change it (c) we keep it the same
24. 24.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
25. 25.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) on the edge of a table (d) in a busy doorway
26. 26.True or false: melting ice is a change that cannot be undone. (a) True (b) False
27. 27.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
28. 28.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
29. 29.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
30. 30.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) it fizzes (d) few or no crystals
31. 31.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) True (b) False
33. 33.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
34. 34.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) nobody needs to (d) the youngest child
35. 35.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) fish make it (c) sea water evaporates (d) salt rains down
36. 36.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
37. 37.⚖️ 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 measure it (b) we keep it the same (c) we change it
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) warm water (d) turmeric powder
39. 39.True or false: sugar does not dissolve in water. (a) False (b) True
40. 40.True or false: glucose powder dissolves in water. (a) False (b) True

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