Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 175 · 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) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
2. 2.⚖️ 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 measure it (c) we change it
3. 3.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) sea water evaporates (c) fish make it (d) salt rains down
4. 4.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
5. 5.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
6. 6.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
7. 7.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) warm water (c) a piece of string (d) yeast
8. 8.⚖️ 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
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) True (b) False
10. 10.⚖️ 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 change it (b) we measure it (c) we keep it the same
11. 11.🔍 Which is the odd one out? (a) sand (b) glucose powder (c) cooking oil (d) chalk powder
12. 12.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) safe from small children (d) on the edge of a table
13. 13.⚖️ 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) the amount of salt (c) days to see crystals
14. 14.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
15. 15.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) warm water (c) a balloon (d) a magnet
16. 16.⚖️ 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
17. 17.True or false: dissolving salt is a change that can be undone. (a) False (b) True
18. 18.🧈 Which of these is a change that can be undone? (a) baking a cake (b) freezing water (c) browning lemon ink (d) milk turning to curd
19. 19.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
20. 20.⚖️ 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
21. 21.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) bigger crystals (d) smaller crystals
22. 22.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
23. 23.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
24. 24.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
25. 25.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) rusting iron (c) dissolving salt (d) cooking an egg
26. 26.True or false: chalk powder does not dissolve in water. (a) False (b) True
27. 27.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
28. 28.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
29. 29.True or false: sugar does not dissolve in water. (a) False (b) True
30. 30.🧈 Which of these is a change that can be undone? (a) melting ice (b) cooking an egg (c) browning lemon ink (d) milk turning to curd
31. 31.🔍 Which is the odd one out? (a) cooking oil (b) sugar (c) small pebbles (d) chalk powder
32. 32.⚖️ 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) the amount of water (c) days to see crystals
33. 33.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
34. 34.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) salt (d) turmeric powder
36. 36.🧂 Which of these dissolves in water? (a) small pebbles (b) table salt (c) cooking oil (d) chalk powder
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a piece of string (d) a balloon
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) salt (c) a piece of string (d) a spoon
39. 39.⚖️ 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 same dish (b) the kind of salt (c) sunny or shady place (d) the amount of salt
40. 40.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals

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