Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 781 · 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: a balloon is needed for growing salt crystals. (a) False (b) True
2. 2.True or false: baking soda does not dissolve in water. (a) True (b) False
3. 3.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
4. 4.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) baking a cake (c) folding paper (d) dissolving salt
5. 5.⚖️ 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 measure it (c) we keep it the same
6. 6.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) salt crystals form (d) sugar crystals form
7. 7.True or false: glucose powder dissolves in water. (a) True (b) False
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) yeast (c) a piece of string (d) a shallow dish
9. 9.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) melting butter (d) browning lemon ink
10. 10.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) yeast (c) a battery cell (d) a piece of string
11. 11.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
12. 12.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny cubes (d) tiny spheres
13. 13.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) sugar (d) sawdust
14. 14.🧈 Which of these is a change that can be undone? (a) melting ice (b) milk turning to curd (c) browning lemon ink (d) rusting iron
15. 15.⚖️ 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 water (b) the kind of salt (c) the amount of salt (d) sunny or shady place
16. 16.⚖️ 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 measure it (b) we change it (c) we keep it the same
17. 17.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
18. 18.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
19. 19.🧂 Which of these dissolves in water? (a) sand (b) table salt (c) chalk powder (d) sawdust
20. 20.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
21. 21.True or false: freezing water is a change that cannot be undone. (a) True (b) False
22. 22.⚖️ 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
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) a piece of string (c) a shallow dish (d) salt
24. 24.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
25. 25.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a shallow dish (d) a battery cell
27. 27.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
28. 28.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) chalk powder (d) sugar
29. 29.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
30. 30.⚖️ 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
31. 31.🧂 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
32. 32.⚖️ 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 change it (b) we keep it the same (c) we measure it
33. 33.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
34. 34.True or false: melting butter is a change that can be undone. (a) True (b) False
35. 35.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) folding paper (c) browning lemon ink (d) cooking an egg
36. 36.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) on the edge of a table (d) next to the baby
37. 37.⚖️ 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 change it (b) we keep it the same (c) we measure it
38. 38.True or false: melting ice is a change that cannot be undone. (a) False (b) True
39. 39.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) yeast (c) warm water (d) salt
40. 40.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed

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