Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 94 · 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.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) food colour (d) sawdust
2. 2.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) liquid crystals (d) no crystals
3. 3.⚖️ 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 change it (c) we keep it the same
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) False (b) True
5. 5.⚖️ 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 keep it the same (b) we measure it (c) we change it
6. 6.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) salt (d) turmeric powder
7. 7.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) salt crystals form (d) sugar crystals form
8. 8.⚖️ 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) the kind of salt (c) days to see crystals (d) sunny or shady place
9. 9.⚖️ 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 salt (b) sunny or shady place (c) days to see crystals (d) the amount of water
10. 10.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) it turns sweet (d) crystals grow faster
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 kept the same. (a) False (b) True
12. 12.True or false: salt is needed for growing salt crystals. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) glucose powder (b) sugar (c) sawdust (d) food colour
14. 14.⚖️ 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
15. 15.🔍 Which is the odd one out? (a) cooking oil (b) sawdust (c) food colour (d) sand
16. 16.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
17. 17.True or false: melting ice is a change that can be undone. (a) True (b) False
18. 18.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to cool the water (c) to make it fizz (d) to change its colour
19. 19.🛟 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
20. 20.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
22. 22.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) table salt (d) chalk powder
23. 23.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
24. 24.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) salt rains down (c) fish make it (d) sand is ground up
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a balloon (c) a shallow dish (d) salt
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) yeast (c) a piece of string (d) warm water
27. 27.True or false: chalk powder dissolves in water. (a) True (b) False
28. 28.True or false: glucose powder does not dissolve in water. (a) True (b) False
29. 29.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) freezing water (c) baking a cake (d) milk turning to curd
30. 30.⚖️ 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 measure it (b) we keep it the same (c) we change it
31. 31.True or false: sand dissolves in water. (a) False (b) True
32. 32.⚖️ 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
33. 33.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
34. 34.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
35. 35.🧂 Which of these dissolves in water? (a) chalk powder (b) small pebbles (c) table salt (d) sand
36. 36.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a balloon (c) a piece of string (d) a spoon
38. 38.⚖️ 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
39. 39.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting butter (c) freezing water (d) browning lemon ink
40. 40.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) melting butter (c) folding paper (d) dissolving salt

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