Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 322 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a piece of string (d) a balloon
2. 2.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
3. 3.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
4. 4.⚖️ 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 keep it the same (b) we change it (c) we measure it
5. 5.⚖️ 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
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) False (b) True
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) False (b) True
9. 9.True or false: chalk powder dissolves in water. (a) False (b) True
10. 10.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
11. 11.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) water evaporates (d) the dish melts
12. 12.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) a grown-up (d) nobody needs to
13. 13.⚖️ 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 salt (c) the kind of salt (d) days to see crystals
14. 14.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
15. 15.🧂 Which of these does not dissolve in water? (a) table salt (b) chalk powder (c) baking soda (d) glucose powder
16. 16.True or false: cooking an egg is a change that can be undone. (a) False (b) True
17. 17.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) saturated (d) frozen
18. 18.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a magnet (c) a shallow dish (d) salt
19. 19.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
20. 20.True or false: salt is needed for growing salt crystals. (a) True (b) False
21. 21.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) liquid crystals (d) bigger crystals
22. 22.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
23. 23.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) milk turning to curd (c) melting butter (d) folding paper
24. 24.🛟 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
25. 25.⚖️ 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 measure it (c) we change it
26. 26.⚖️ 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
27. 27.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
28. 28.True or false: salt is not needed for growing salt crystals. (a) False (b) True
29. 29.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
30. 30.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) dissolving salt (c) browning lemon ink (d) baking a cake
31. 31.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) browning lemon ink (d) folding paper
32. 32.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to change its colour (c) to cool the water (d) to make it fizz
33. 33.⚖️ 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) True (b) False
34. 34.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a mirror (c) a piece of string (d) warm water
35. 35.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
36. 36.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
37. 37.🔍 Which is the odd one out? (a) baking soda (b) sugar (c) small pebbles (d) food colour
38. 38.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) fish make it (c) salt rains down (d) sand is ground up
39. 39.⚖️ 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 change it (c) we keep it the same
40. 40.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False

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