Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 325 · 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.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) few or no crystals (d) it fizzes
2. 2.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
3. 3.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny spheres (d) tiny stars
4. 4.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
5. 5.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) salt eats water (d) the dish melts
6. 6.🛟 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
7. 7.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) rusting iron (d) melting butter
8. 8.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
9. 9.True or false: freezing water is a change that can be undone. (a) False (b) True
10. 10.True or false: glucose powder dissolves in water. (a) True (b) False
11. 11.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to oil (d) it turns to butter
12. 12.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) sawdust (d) baking soda
13. 13.⚖️ 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
14. 14.⚖️ 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 change it (b) we measure it (c) we keep it the same
15. 15.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
16. 16.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) frozen (d) saturated
17. 17.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
18. 18.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) in a busy doorway (d) on the edge of a table
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 magnet (d) a spoon
20. 20.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
21. 21.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) dissolving salt (c) rusting iron (d) baking a cake
22. 22.⚖️ 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 keep it the same (c) we change it
23. 23.⚖️ 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 water (b) the kind of salt (c) the amount of salt (d) sunny or shady place
24. 24.⚖️ 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
25. 25.🌊 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
26. 26.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
27. 27.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
28. 28.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) a spoon (c) a shallow dish (d) warm water
29. 29.⚖️ 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
30. 30.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) freezing water (c) folding paper (d) dissolving salt
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a balloon (d) a piece of string
32. 32.🧂 Which of these dissolves in water? (a) cooking oil (b) sand (c) glucose powder (d) chalk powder
33. 33.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a balloon (c) warm water (d) a spoon
34. 34.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
35. 35.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
36. 36.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
37. 37.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the kind of salt (b) sunny or shady place (c) days to see crystals
39. 39.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) yeast (c) a battery cell (d) salt
40. 40.True or false: folding paper is a change that cannot be undone. (a) False (b) True

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