Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 800 · 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.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
2. 2.⚖️ 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
3. 3.⚖️ 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
4. 4.⚖️ 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 keep it the same (b) we measure it (c) we change it
5. 5.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) few or no crystals (d) crystals grow faster
6. 6.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
7. 7.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) sea water evaporates (c) salt rains down (d) fish make it
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) yeast (d) warm water
9. 9.⚖️ 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) sunny or shady place (d) days to see crystals
10. 10.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
11. 11.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) freezing water (c) melting butter (d) melting ice
12. 12.⚖️ 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
13. 13.True or false: sugar dissolves in water. (a) True (b) False
14. 14.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting butter (c) baking a cake (d) melting ice
15. 15.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) chalk powder (d) glucose powder
16. 16.⚖️ 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) False (b) True
17. 17.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a shallow dish (c) turmeric powder (d) a magnet
18. 18.🔮 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
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a spoon (d) turmeric powder
20. 20.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
21. 21.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
22. 22.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
23. 23.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the kind of salt (b) days to see crystals (c) sunny or shady place
25. 25.True or false: cooking an egg is a change that can be undone. (a) False (b) True
26. 26.⚖️ 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 change it (b) we keep it the same (c) we measure it
27. 27.🔍 Which is the odd one out? (a) baking soda (b) sand (c) food colour (d) sugar
28. 28.⚖️ 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 same dish (b) the amount of salt (c) the amount of water (d) days to see crystals
29. 29.True or false: glucose powder dissolves in water. (a) True (b) False
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a shallow dish (d) a magnet
31. 31.🧂 Which of these dissolves in water? (a) small pebbles (b) sand (c) glucose powder (d) cooking oil
32. 32.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
33. 33.True or false: freezing water is a change that can be undone. (a) False (b) True
34. 34.🧂 Which of these does not dissolve in water? (a) table salt (b) food colour (c) baking soda (d) small pebbles
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a mirror (c) warm water (d) a piece of string
37. 37.True or false: cooking oil dissolves in water. (a) True (b) False
38. 38.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
39. 39.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.True or false: baking soda does not dissolve in water. (a) True (b) False

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