Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 898 · 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.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
2. 2.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
3. 3.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) few or no crystals (d) it fizzes
4. 4.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) it turns to butter (d) sugar crystals form
5. 5.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
6. 6.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) salt (c) a mirror (d) a battery cell
7. 7.True or false: table salt dissolves in water. (a) True (b) False
8. 8.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) melting butter (d) baking a cake
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
10. 10.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
11. 11.True or false: baking soda dissolves in water. (a) False (b) True
12. 12.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
13. 13.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it fizz (c) to cool the water (d) to make it very salty
14. 14.⚖️ 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
15. 15.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
16. 16.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
17. 17.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
18. 18.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) a spoon (d) a balloon
19. 19.🧺 Which of these is not needed for growing salt crystals? (a) turmeric powder (b) salt (c) a spoon (d) a shallow dish
20. 20.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) next to the baby (d) in a busy doorway
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) False (b) True
22. 22.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny spheres (d) tiny triangles
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) turmeric powder (c) warm water (d) a piece of string
24. 24.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a shallow dish (c) yeast (d) a magnet
25. 25.⚖️ 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 keep it the same (b) we measure it (c) we change it
26. 26.⚖️ 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 keep it the same (b) we measure it (c) we change it
27. 27.⚖️ 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
28. 28.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.⚖️ 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
30. 30.⚖️ 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 change it (c) we measure it
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) salt (c) a spoon (d) warm water
32. 32.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a battery cell (c) yeast (d) a piece of string
33. 33.🛟 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
34. 34.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) cooking oil (b) sugar (c) sawdust (d) sand
36. 36.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
37. 37.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
38. 38.True or false: warm water is needed for growing salt crystals. (a) True (b) False
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) warm water (d) a balloon
40. 40.⚖️ 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) the amount of salt (c) sunny or shady place (d) the amount of water

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