Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 611 · 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.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) safe from small children (d) in a busy doorway
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 change it (b) we measure it (c) we keep it the same
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a spoon (c) a shallow dish (d) warm water
4. 4.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) few or no crystals (d) crystals grow faster
5. 5.True or false: warm water is needed for growing salt crystals. (a) False (b) True
6. 6.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
7. 7.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
8. 8.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) warm water (c) a spoon (d) salt
10. 10.⚖️ 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 amount of salt (c) days to see crystals
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a balloon (c) warm water (d) a spoon
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a magnet (d) a shallow dish
13. 13.True or false: food colour dissolves in water. (a) True (b) False
14. 14.True or false: sawdust dissolves in water. (a) False (b) True
15. 15.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
16. 16.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) nobody needs to (d) the youngest child
17. 17.🔍 Which is the odd one out? (a) food colour (b) sawdust (c) chalk powder (d) sand
18. 18.⚖️ 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) sunny or shady place (c) days to see crystals (d) the amount of water
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a shallow dish (d) yeast
20. 20.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) glucose powder (d) sawdust
22. 22.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) browning lemon ink (c) melting butter (d) melting ice
23. 23.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
24. 24.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
25. 25.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
26. 26.True or false: melting ice is a change that can be undone. (a) False (b) True
27. 27.True or false: folding paper is a change that cannot be undone. (a) False (b) True
28. 28.⚖️ 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
29. 29.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sea water evaporates (d) sand is ground up
30. 30.🧂 Which of these dissolves in water? (a) sawdust (b) chalk powder (c) cooking oil (d) food colour
31. 31.🧂 Which of these does not dissolve in water? (a) baking soda (b) sawdust (c) food colour (d) sugar
32. 32.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) water evaporates (d) salt eats water
33. 33.True or false: sawdust does not dissolve in water. (a) False (b) True
34. 34.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
35. 35.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
36. 36.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) browning lemon ink (c) freezing water (d) milk turning to curd
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a mirror (d) a spoon
38. 38.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) freezing water (d) cooking an egg
39. 39.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
40. 40.True or false: cooking an egg is a change that can be undone. (a) True (b) False

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