Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 495 · 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.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
2. 2.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
3. 3.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) a battery cell (d) warm water
5. 5.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) milk turning to curd (c) melting butter (d) folding paper
6. 6.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) sand is ground up (d) fish make it
7. 7.True or false: folding paper is a change that cannot be undone. (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: the amount of salt is kept the same. (a) True (b) False
9. 9.⚖️ 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 keep it the same (b) we measure it (c) we change it
10. 10.⚖️ 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) days to see crystals (d) the kind of salt
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a shallow dish (d) a mirror
12. 12.True or false: dissolving salt is a change that can be undone. (a) False (b) True
13. 13.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) crystals grow faster (d) it turns sweet
14. 14.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
15. 15.⚖️ 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) True (b) False
16. 16.True or false: melting ice is a change that cannot be undone. (a) True (b) False
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) turmeric powder (c) a spoon (d) a piece of string
18. 18.True or false: sawdust dissolves in water. (a) True (b) False
19. 19.⚖️ 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 change it (b) we keep it the same (c) we measure it
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a mirror (c) salt (d) a spoon
21. 21.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) melting butter (c) baking a cake (d) milk turning to curd
22. 22.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) sugar (d) food colour
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False
24. 24.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
25. 25.⚖️ 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 change it (b) we keep it the same (c) we measure it
26. 26.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
27. 27.True or false: baking soda does not dissolve in water. (a) False (b) True
28. 28.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) safe from small children (d) on the edge of a table
29. 29.🧺 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 magnet
30. 30.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) sugar (d) sand
31. 31.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) browning lemon ink (d) melting ice
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a spoon (c) a piece of string (d) warm water
33. 33.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
34. 34.🧂 Which of these dissolves in water? (a) chalk powder (b) table salt (c) small pebbles (d) cooking oil
35. 35.⚖️ 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 amount of water (c) sunny or shady place
36. 36.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
37. 37.True or false: cooking an egg is a change that can be undone. (a) False (b) True
38. 38.🧂 Which of these does not dissolve in water? (a) cooking oil (b) food colour (c) glucose powder (d) table salt
39. 39.⚖️ 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 water (b) sunny or shady place (c) the same dish (d) days to see crystals
40. 40.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals

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