Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 810 · 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) not needed (b) needed
2. 2.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) dissolving salt (c) folding paper (d) melting ice
3. 3.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) yeast (d) a piece of string
4. 4.⚖️ 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) True (b) False
5. 5.⚖️ 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 keep it the same (c) we change it
6. 6.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
7. 7.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a balloon (c) a magnet (d) yeast
8. 8.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
9. 9.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) cooking oil (d) sugar
10. 10.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
11. 11.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) table salt (b) food colour (c) sand (d) sugar
13. 13.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
14. 14.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) browning lemon ink (c) baking a cake (d) melting ice
15. 15.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) sugar crystals form (d) salt crystals form
16. 16.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) water evaporates (d) the dish melts
17. 17.⚖️ 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) the amount of water (c) the amount of salt (d) sunny or shady place
18. 18.True or false: sugar does not dissolve in water. (a) False (b) True
19. 19.⚖️ 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
20. 20.⚖️ 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 change it (b) we keep it the same (c) we measure it
21. 21.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
22. 22.🧂 Which of these does not dissolve in water? (a) table salt (b) cooking oil (c) glucose powder (d) food colour
23. 23.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
24. 24.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) sugar (d) sawdust
25. 25.🧂 Which of these dissolves in water? (a) chalk powder (b) cooking oil (c) sawdust (d) table salt
26. 26.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) magnetic (d) saturated
27. 27.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) freezing water (d) rusting iron
28. 28.🧺 Do we need a spoon 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 same dish is kept the same. (a) True (b) False
30. 30.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) turmeric powder (d) warm water
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 measure it (b) we keep it the same (c) we change it
33. 33.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
34. 34.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) baking a cake (c) freezing water (d) browning lemon ink
35. 35.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
36. 36.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it very salty (d) to make it fizz
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a shallow dish (c) warm water (d) a spoon
38. 38.🔍 Which is the odd one out? (a) glucose powder (b) small pebbles (c) baking soda (d) table salt
39. 39.🧂 Which of these dissolves in water? (a) sawdust (b) cooking oil (c) baking soda (d) sand
40. 40.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child

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