Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 538 · 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) sand (b) sugar (c) baking soda (d) food colour
2. 2.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it turns sweet (d) it fizzes
3. 3.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) salt eats water (d) the dish melts
4. 4.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
5. 5.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
6. 6.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a balloon (c) salt (d) yeast
8. 8.True or false: small pebbles does not dissolve in water. (a) False (b) True
9. 9.⚖️ 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
10. 10.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
11. 11.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
12. 12.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
13. 13.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a balloon (c) salt (d) a spoon
14. 14.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) it turns to oil (d) sugar crystals form
15. 15.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a mirror (c) a battery cell (d) a shallow dish
16. 16.⚖️ 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 amount of water (c) the amount of salt (d) days to see crystals
17. 17.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
18. 18.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
19. 19.🧈 Which of these is a change that can be undone? (a) folding paper (b) cooking an egg (c) browning lemon ink (d) rusting iron
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) True (b) False
21. 21.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
22. 22.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
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 water”? (a) we keep it the same (b) we measure it (c) we change it
24. 24.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) sea water evaporates (d) fish make it
25. 25.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
26. 26.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
27. 27.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) yeast (c) a spoon (d) salt
28. 28.⚖️ 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 measure it (b) we keep it the same (c) we change it
29. 29.True or false: cooking an egg is a change that can be undone. (a) False (b) True
30. 30.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
31. 31.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
32. 32.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) turmeric powder (d) salt
34. 34.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to cool the water (c) to change its colour (d) to make it fizz
35. 35.⚖️ 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 same dish (b) sunny or shady place (c) the kind of salt (d) days to see crystals
36. 36.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
38. 38.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) magnetic (d) empty
39. 39.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
40. 40.⚖️ 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 measure it (b) we keep it the same (c) we change it

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