Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 946 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a magnet (c) a piece of string (d) a spoon
2. 2.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
3. 3.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) cooking an egg (c) melting butter (d) folding paper
4. 4.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
6. 6.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
7. 7.🧂 Which of these does not dissolve in water? (a) table salt (b) chalk powder (c) food colour (d) baking soda
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.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) safe from small children (d) on the edge of a table
10. 10.🔍 Which is the odd one out? (a) sawdust (b) chalk powder (c) small pebbles (d) sugar
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a battery cell (d) a spoon
12. 12.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
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 amount of water
14. 14.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) salt (c) a battery cell (d) yeast
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) sunny or shady place (d) days to see crystals
16. 16.⚖️ 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 change it (b) we keep it the same (c) we measure it
17. 17.⚖️ 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 measure it (c) we change it
18. 18.🧈 Which of these is a change that can be undone? (a) baking a cake (b) dissolving salt (c) cooking an egg (d) rusting iron
19. 19.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) no crystals (d) bigger crystals
20. 20.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) freezing water (d) rusting iron
21. 21.🧂 Which of these does not dissolve in water? (a) cooking oil (b) table salt (c) baking soda (d) glucose powder
22. 22.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a balloon (c) a mirror (d) a spoon
23. 23.True or false: yeast is needed for growing salt crystals. (a) False (b) True
24. 24.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) salt crystals form (d) sugar crystals form
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) a shallow dish (c) warm water (d) salt
26. 26.True or false: food colour dissolves in water. (a) False (b) True
27. 27.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) a shallow dish (d) a magnet
28. 28.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) warm water (c) a battery cell (d) a piece of string
29. 29.🔍 Which is the odd one out? (a) cooking oil (b) table salt (c) sugar (d) food colour
30. 30.🧂 Which of these dissolves in water? (a) cooking oil (b) sugar (c) chalk powder (d) sawdust
31. 31.⚖️ 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) False (b) True
32. 32.⚖️ 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) the amount of salt (b) the amount of water (c) the kind of salt (d) sunny or shady place
33. 33.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
34. 34.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
35. 35.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
36. 36.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) salt grows roots (d) the dish melts
37. 37.⚖️ 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 change it (c) we measure it
38. 38.⚖️ 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
39. 39.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
40. 40.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) fish make it (c) salt rains down (d) sea water evaporates

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