Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 377 · 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? Which of these is the one thing we change? (a) sunny or shady place (b) the kind of salt (c) days to see crystals (d) the amount of water
2. 2.⚖️ 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 keep it the same (c) we change it
3. 3.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) a magnet (d) warm water
4. 4.⚖️ 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
5. 5.⚖️ 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 keep it the same (b) we change it (c) we measure it
6. 6.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
7. 7.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a battery cell (d) a shallow dish
9. 9.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
10. 10.🧂 Which of these dissolves in water? (a) small pebbles (b) sand (c) baking soda (d) cooking oil
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) True (b) False
12. 12.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) a grown-up (d) the youngest child
13. 13.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
14. 14.⚖️ 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 kind of salt
15. 15.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) a piece of string (d) yeast
16. 16.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
17. 17.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting butter (c) freezing water (d) baking a cake
18. 18.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) sand (d) food colour
19. 19.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) turmeric powder (c) a mirror (d) salt
20. 20.True or false: glucose powder dissolves in water. (a) False (b) True
21. 21.True or false: rusting iron is a change that can be undone. (a) False (b) True
22. 22.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) next to the baby (d) on the edge of a table
23. 23.⚖️ 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 same dish (c) days to see crystals
24. 24.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) sand is ground up (d) fish make it
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False
26. 26.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
27. 27.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) a mirror (d) a spoon
28. 28.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
29. 29.⚖️ 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
30. 30.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
31. 31.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) table salt (b) cooking oil (c) food colour (d) sugar
33. 33.True or false: small pebbles dissolves in water. (a) True (b) False
34. 34.True or false: chalk powder dissolves in water. (a) False (b) True
35. 35.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
37. 37.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a magnet (c) a balloon (d) warm water
38. 38.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) melting ice (d) rusting iron
39. 39.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) sugar crystals form (d) it turns to oil
40. 40.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sawdust (c) table salt (d) food colour

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