Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 789 · 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? What do we do with “the amount of salt”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.True or false: dissolving salt is a change that can be undone. (a) False (b) True
3. 3.⚖️ 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
4. 4.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
5. 5.True or false: baking a cake is a change that can be undone. (a) True (b) False
6. 6.True or false: melting ice is a change that can 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 what we measure? (a) the amount of water (b) days to see crystals (c) sunny or shady place (d) the amount of salt
8. 8.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
9. 9.⚖️ 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
10. 10.⚖️ 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
11. 11.True or false: melting ice is a change that cannot be undone. (a) True (b) False
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the kind of salt (c) days to see crystals
13. 13.🔍 Which is the odd one out? (a) cooking oil (b) chalk powder (c) food colour (d) sand
14. 14.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a shallow dish (c) a piece of string (d) salt
16. 16.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
17. 17.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
18. 18.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
19. 19.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
20. 20.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) warm water (c) a balloon (d) salt
21. 21.🧂 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
22. 22.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) salt (d) a magnet
23. 23.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
24. 24.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
25. 25.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
26. 26.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
27. 27.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we change it (b) we keep it the same (c) we measure it
29. 29.🧂 Which of these does not dissolve in water? (a) sand (b) glucose powder (c) baking soda (d) sugar
30. 30.True or false: freezing water is a change that cannot be undone. (a) False (b) True
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) yeast (d) a shallow dish
32. 32.⚖️ 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) sunny or shady place (c) the amount of salt (d) the amount of water
33. 33.⚖️ 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 change it (c) we measure it
34. 34.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
35. 35.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) yeast (d) a spoon
36. 36.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
37. 37.⚖️ 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) False (b) True
38. 38.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) it turns to oil (d) salt crystals form
39. 39.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
40. 40.True or false: cooking oil dissolves in water. (a) False (b) True

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