Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 183 · 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 yeast for growing salt crystals? (a) needed (b) not needed
2. 2.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
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 measure it (b) we keep it the same (c) we change it
4. 4.⚖️ 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) sunny or shady place (c) the amount of water (d) days to see crystals
5. 5.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
6. 6.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) it fizzes (d) crystals grow faster
7. 7.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
8. 8.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
9. 9.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it very salty (c) to make it fizz (d) to change its colour
10. 10.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
11. 11.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a mirror (c) yeast (d) a balloon
12. 12.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
13. 13.True or false: freezing water is a change that can be undone. (a) True (b) False
14. 14.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) milk turning to curd (c) melting butter (d) folding paper
15. 15.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
16. 16.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
17. 17.⚖️ 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 keep it the same (b) we measure it (c) we change it
18. 18.True or false: salt is not needed for growing salt crystals. (a) True (b) False
19. 19.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) sand (b) sugar (c) small pebbles (d) cooking oil
22. 22.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) liquid crystals (d) no crystals
23. 23.⚖️ 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 same dish (b) sunny or shady place (c) the kind of salt (d) the amount of water
24. 24.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) a mirror (d) salt
25. 25.⚖️ 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 salt (c) sunny or shady place
26. 26.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
27. 27.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) nobody needs to (d) the youngest child
28. 28.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
29. 29.⚖️ 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) False (b) True
30. 30.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
31. 31.🧂 Which of these dissolves in water? (a) food colour (b) small pebbles (c) sand (d) cooking oil
32. 32.🧈 Which of these is a change that can be undone? (a) baking a cake (b) dissolving salt (c) milk turning to curd (d) cooking an egg
33. 33.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
34. 34.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) melting butter (c) dissolving salt (d) freezing water
35. 35.⚖️ 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
36. 36.🔍 Which is the odd one out? (a) table salt (b) sugar (c) glucose powder (d) sand
37. 37.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
38. 38.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) sugar (d) chalk powder
39. 39.⚖️ 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
40. 40.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a shallow dish (c) turmeric powder (d) a mirror

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