Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 539 · 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.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
2. 2.True or false: glucose powder dissolves in water. (a) False (b) True
3. 3.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) it turns sweet (d) few or no crystals
4. 4.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) freezing water (d) cooking an egg
5. 5.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) warm water (d) turmeric powder
7. 7.🔍 Which is the odd one out? (a) sand (b) cooking oil (c) glucose powder (d) sawdust
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a balloon (d) warm water
9. 9.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) next to the baby (d) in a busy doorway
10. 10.True or false: glucose powder does not dissolve in water. (a) True (b) False
11. 11.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
12. 12.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
13. 13.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) salt (c) a mirror (d) yeast
14. 14.True or false: small pebbles does not dissolve in water. (a) True (b) False
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the amount of water (c) the same dish (d) the amount of salt
16. 16.⚖️ 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 water (c) days to see crystals (d) the kind of salt
17. 17.⚖️ 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) True (b) False
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a battery cell (d) salt
19. 19.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
20. 20.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
21. 21.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) nobody needs to (d) the youngest child
22. 22.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
23. 23.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
24. 24.True or false: freezing water is a change that can be undone. (a) True (b) False
25. 25.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
26. 26.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) freezing water (d) milk turning to curd
27. 27.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sea water evaporates (d) sand is ground up
28. 28.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a piece of string (d) a balloon
29. 29.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
30. 30.True or false: salt is not needed for growing salt crystals. (a) False (b) True
31. 31.⚖️ 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) True (b) False
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a shallow dish (d) a magnet
33. 33.⚖️ 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) True (b) False
34. 34.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) folding paper (c) browning lemon ink (d) dissolving salt
35. 35.🔍 Which is the odd one out? (a) cooking oil (b) small pebbles (c) table salt (d) chalk powder
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 kept the same. (a) True (b) False
37. 37.True or false: baking soda dissolves in water. (a) True (b) False
38. 38.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
39. 39.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
40. 40.True or false: browning lemon ink is a change that can be undone. (a) False (b) True

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