Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 618 · 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.True or false: melting ice is a change that can be undone. (a) False (b) True
2. 2.True or false: cooking oil dissolves in water. (a) False (b) True
3. 3.🧂 Which of these dissolves in water? (a) cooking oil (b) sand (c) table salt (d) sawdust
4. 4.🛟 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
5. 5.⚖️ 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) sunny or shady place (c) the kind of salt (d) days to see crystals
6. 6.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sand is ground up (c) fish make it (d) sea water evaporates
7. 7.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) folding paper (c) melting butter (d) melting ice
8. 8.⚖️ 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
9. 9.🔍 Which is the odd one out? (a) table salt (b) chalk powder (c) glucose powder (d) baking soda
10. 10.⚖️ 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 kind of salt (b) the amount of salt (c) sunny or shady place (d) days to see crystals
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) warm water (d) a magnet
12. 12.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it fizzes (c) crystals grow faster (d) it turns sweet
13. 13.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
14. 14.⚖️ 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 measure it (b) we change it (c) we keep it the same
15. 15.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) cooking oil (d) baking soda
16. 16.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a magnet (c) a mirror (d) warm water
17. 17.⚖️ 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 same dish (c) sunny or shady place
18. 18.True or false: food colour does not dissolve in water. (a) True (b) False
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) salt (d) a battery cell
20. 20.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) frozen (d) magnetic
21. 21.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a balloon (c) salt (d) a spoon
23. 23.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) chalk powder (d) food colour
24. 24.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
25. 25.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a shallow dish (d) turmeric powder
27. 27.🔍 Which is the odd one out? (a) sand (b) glucose powder (c) sugar (d) table salt
28. 28.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) milk turning to curd (c) melting butter (d) freezing water
29. 29.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) bigger crystals (d) liquid crystals
30. 30.True or false: melting butter is a change that cannot be undone. (a) False (b) True
31. 31.True or false: sand dissolves in water. (a) True (b) False
32. 32.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
33. 33.🧂 Which of these dissolves in water? (a) cooking oil (b) sugar (c) sawdust (d) sand
34. 34.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) folding paper (d) baking a cake
35. 35.🧂 Which of these does not dissolve in water? (a) cooking oil (b) food colour (c) glucose powder (d) table salt
36. 36.True or false: melting butter is a change that can be undone. (a) False (b) True
37. 37.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) turmeric powder (c) a magnet (d) salt
38. 38.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) turmeric powder (c) a piece of string (d) yeast
39. 39.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
40. 40.⚖️ 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

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