Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 470 · 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.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) salt eats water (d) water evaporates
2. 2.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
3. 3.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) no crystals (d) smaller crystals
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a balloon (c) warm water (d) a piece of string
6. 6.⚖️ 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) days to see crystals (c) the kind of salt (d) sunny or shady place
7. 7.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
8. 8.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) it turns to butter (d) salt crystals form
9. 9.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
10. 10.🔍 Which is the odd one out? (a) table salt (b) sand (c) sugar (d) baking soda
11. 11.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
12. 12.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
13. 13.🧂 Which of these does not dissolve in water? (a) cooking oil (b) table salt (c) food colour (d) glucose powder
14. 14.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
15. 15.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) rusting iron (d) freezing water
16. 16.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sea water evaporates (c) salt rains down (d) sand is ground up
17. 17.⚖️ 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 change it (b) we measure it (c) we keep it the same
18. 18.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
19. 19.⚖️ 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) the amount of water (c) sunny or shady place
20. 20.🧂 Which of these does not dissolve in water? (a) food colour (b) baking soda (c) chalk powder (d) sugar
21. 21.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) True (b) False
23. 23.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) food colour (d) cooking oil
24. 24.⚖️ 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 keep it the same (b) we measure it (c) we change it
25. 25.True or false: folding paper is a change that can be undone. (a) True (b) False
26. 26.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
27. 27.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
28. 28.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a balloon (c) a shallow dish (d) yeast
29. 29.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
30. 30.🔍 Which is the odd one out? (a) chalk powder (b) cooking oil (c) sugar (d) sawdust
31. 31.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
32. 32.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a shallow dish (d) a magnet
34. 34.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) in a busy doorway (d) next to the baby
35. 35.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny triangles (c) tiny stars (d) tiny spheres
36. 36.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) frozen (c) saturated (d) empty
37. 37.🔍 Which is the odd one out? (a) baking soda (b) chalk powder (c) glucose powder (d) sugar
38. 38.🔍 Which is the odd one out? (a) small pebbles (b) table salt (c) sugar (d) baking soda
39. 39.True or false: sand dissolves in water. (a) True (b) False
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a shallow dish (d) a battery cell

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