Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 387 · 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? Which of these is the one thing we change? (a) sunny or shady place (b) days to see crystals (c) the amount of water (d) the amount of salt
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) False (b) True
3. 3.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
4. 4.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
5. 5.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) it fizzes (d) few or no crystals
6. 6.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) it turns to oil (d) salt crystals form
7. 7.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
8. 8.True or false: melting butter is a change that cannot be undone. (a) False (b) True
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the amount of salt (b) days to see crystals (c) sunny or shady place
10. 10.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) in a busy doorway (d) safe from small children
11. 11.⚖️ 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) days to see crystals (d) the kind of salt
12. 12.⚖️ 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
13. 13.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) folding paper (d) rusting iron
14. 14.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
15. 15.⚖️ 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 measure it (b) we keep it the same (c) we change it
16. 16.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
17. 17.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a mirror (c) a balloon (d) a spoon
18. 18.True or false: freezing water is a change that can be undone. (a) False (b) True
19. 19.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.True or false: table salt does not dissolve in water. (a) False (b) True
21. 21.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a piece of string (d) yeast
23. 23.⚖️ 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
24. 24.⚖️ 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
25. 25.⚖️ 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
26. 26.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a magnet (c) a mirror (d) a balloon
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) True (b) False
28. 28.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) water evaporates (d) salt grows roots
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) turmeric powder (c) a piece of string (d) a spoon
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a balloon (d) a shallow dish
31. 31.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
32. 32.🧂 Which of these dissolves in water? (a) sawdust (b) sugar (c) sand (d) chalk powder
33. 33.🔍 Which is the odd one out? (a) table salt (b) cooking oil (c) sand (d) small pebbles
34. 34.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
35. 35.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
36. 36.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) sugar (d) cooking oil
37. 37.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a piece of string (d) a magnet
39. 39.True or false: glucose powder does not dissolve in water. (a) True (b) False
40. 40.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) folding paper (c) dissolving salt (d) browning lemon ink

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