Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 393 · 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.⚖️ 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 same dish (c) the amount of water (d) sunny or shady place
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
3. 3.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a piece of string (c) turmeric powder (d) warm water
4. 4.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
5. 5.🌊 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
6. 6.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
7. 7.⚖️ 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) sunny or shady place (c) the amount of salt
8. 8.🧂 Which of these dissolves in water? (a) cooking oil (b) sand (c) sawdust (d) sugar
9. 9.🛟 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
10. 10.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
11. 11.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
12. 12.True or false: baking soda does not dissolve in water. (a) True (b) False
13. 13.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
14. 14.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a mirror (c) a shallow dish (d) a spoon
15. 15.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) salt grows roots (d) water evaporates
16. 16.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) glucose powder (d) cooking oil
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a spoon (d) a balloon
18. 18.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) melting butter (d) rusting iron
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a magnet (d) salt
20. 20.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
21. 21.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
22. 22.⚖️ 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
23. 23.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) small pebbles (b) sawdust (c) chalk powder (d) table salt
25. 25.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) smaller crystals (d) liquid crystals
26. 26.True or false: salt is not needed for growing salt crystals. (a) True (b) False
27. 27.True or false: melting butter is a change that can be undone. (a) True (b) False
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 what we measure. (a) True (b) False
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a spoon (c) salt (d) warm water
30. 30.True or false: warm water is needed for growing salt crystals. (a) True (b) False
31. 31.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) yeast (d) a spoon
33. 33.⚖️ 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
34. 34.⚖️ 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 measure it (b) we keep it the same (c) we change it
35. 35.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) a battery cell (d) salt
36. 36.⚖️ 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) True (b) False
37. 37.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) salt crystals form (d) it turns to oil
38. 38.⚖️ 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 measure it (b) we keep it the same (c) we change it
39. 39.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
40. 40.True or false: table salt does not dissolve in water. (a) False (b) True

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