Salt Crystal Experiment Worksheet

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

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