Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 809 · 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.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
2. 2.True or false: melting butter is a change that can be undone. (a) False (b) True
3. 3.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
4. 4.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) saturated (d) frozen
5. 5.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
6. 6.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to change its colour (d) to cool the water
7. 7.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting ice (c) cooking an egg (d) melting butter
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) True (b) False
9. 9.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) folding paper (c) rusting iron (d) baking a cake
10. 10.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) liquid crystals (d) smaller crystals
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) salt (c) a piece of string (d) warm water
12. 12.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) water evaporates (d) salt eats water
13. 13.🧂 Which of these does not dissolve in water? (a) table salt (b) small pebbles (c) glucose powder (d) food colour
14. 14.🔍 Which is the odd one out? (a) baking soda (b) chalk powder (c) sand (d) cooking oil
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a shallow dish (d) a battery cell
16. 16.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) warm water (c) yeast (d) turmeric powder
17. 17.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) next to the baby (d) on the edge of a table
18. 18.⚖️ 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 change it (b) we measure it (c) we keep it the same
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
20. 20.🔍 Which is the odd one out? (a) food colour (b) chalk powder (c) small pebbles (d) cooking oil
21. 21.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a piece of string (d) a battery cell
22. 22.True or false: sand does not dissolve in water. (a) False (b) True
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 salt”? (a) we change it (b) we measure it (c) we keep it the same
24. 24.True or false: freezing water is a change that cannot be undone. (a) False (b) True
25. 25.🧈 Which of these is a change that can be undone? (a) melting ice (b) browning lemon ink (c) cooking an egg (d) milk turning to curd
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 water”? (a) we keep it the same (b) we change it (c) we measure it
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a spoon (d) a balloon
28. 28.⚖️ 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) False (b) True
29. 29.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) glucose powder (d) cooking oil
30. 30.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
31. 31.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a piece of string (c) turmeric powder (d) a balloon
32. 32.🧂 Which of these does not dissolve in water? (a) chalk powder (b) baking soda (c) glucose powder (d) sugar
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a spoon (c) a shallow dish (d) a piece of string
34. 34.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
35. 35.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) it turns sweet (d) few or no crystals
36. 36.⚖️ 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 amount of salt (b) the kind of salt (c) days to see crystals (d) the amount of water
37. 37.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
38. 38.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.True or false: folding paper is a change that can be undone. (a) False (b) True
40. 40.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed

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