Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 260 · 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 of these is needed for growing salt crystals? (a) a battery cell (b) turmeric powder (c) salt (d) a mirror
2. 2.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
3. 3.⚖️ 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 change it (b) we measure it (c) we keep it the same
4. 4.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to make it very salty (d) to cool the water
5. 5.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny spheres (d) tiny triangles
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) a magnet (d) a piece of string
7. 7.⚖️ 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 kind of salt (c) the amount of water (d) the amount of salt
8. 8.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
9. 9.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
11. 11.⚖️ 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 change it (c) we measure it
12. 12.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
13. 13.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
14. 14.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) a shallow dish (c) warm water (d) a spoon
15. 15.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sea water evaporates (c) sand is ground up (d) salt rains down
16. 16.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
17. 17.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) a mirror (c) a magnet (d) yeast
18. 18.True or false: yeast is needed for growing salt crystals. (a) True (b) False
19. 19.True or false: freezing water is a change that cannot be undone. (a) True (b) False
20. 20.🔮 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
21. 21.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
23. 23.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
24. 24.⚖️ 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
25. 25.True or false: sand does not dissolve in water. (a) False (b) True
26. 26.True or false: rusting iron is a change that can be undone. (a) False (b) True
27. 27.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
28. 28.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
29. 29.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) dissolving salt (c) rusting iron (d) browning lemon ink
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) turmeric powder (d) salt
31. 31.🔍 Which is the odd one out? (a) sawdust (b) chalk powder (c) food colour (d) sand
32. 32.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) melting ice (c) melting butter (d) freezing water
33. 33.⚖️ 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 salt
34. 34.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
35. 35.🧂 Which of these does not dissolve in water? (a) baking soda (b) sugar (c) glucose powder (d) sand
36. 36.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
37. 37.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) the dish melts (c) salt eats water (d) salt grows roots
38. 38.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) cooking oil (d) table salt
39. 39.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) food colour (d) sand
40. 40.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water

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