Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 685 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) warm water (c) a spoon (d) salt
2. 2.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
3. 3.🧂 Which of these does not dissolve in water? (a) baking soda (b) sawdust (c) table salt (d) sugar
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) warm water (c) a piece of string (d) salt
5. 5.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) the dish melts (d) salt eats water
6. 6.⚖️ 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 salt (b) the amount of water (c) sunny or shady place (d) days to see crystals
7. 7.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
8. 8.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
9. 9.⚖️ 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
10. 10.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) it fizzes (d) crystals grow faster
11. 11.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
12. 12.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
13. 13.🧂 Which of these does not dissolve in water? (a) baking soda (b) food colour (c) sand (d) sugar
14. 14.⚖️ 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
15. 15.⚖️ 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
16. 16.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
17. 17.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) safe from small children (d) on the edge of a table
18. 18.⚖️ 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) False (b) True
19. 19.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
20. 20.⚖️ 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 change it (c) we keep it the same
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) salt (c) warm water (d) a piece of string
22. 22.⚖️ 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 kind of salt (b) days to see crystals (c) sunny or shady place
23. 23.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) glucose powder (d) small pebbles
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) False (b) True
25. 25.True or false: dissolving salt is a change that can be undone. (a) True (b) False
26. 26.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it very salty (c) to change its colour (d) to make it fizz
27. 27.True or false: chalk powder dissolves in water. (a) True (b) False
28. 28.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.True or false: a spoon is not needed for growing salt crystals. (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 “sunny or shady place”? (a) we keep it the same (b) we change it (c) we measure it
31. 31.⚖️ 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 measure it (c) we keep it the same
32. 32.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
33. 33.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) turmeric powder (c) a shallow dish (d) a spoon
34. 34.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) salt crystals form (d) it turns to oil
35. 35.⚖️ 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 kind of salt (b) days to see crystals (c) the same dish (d) sunny or shady place
36. 36.🧂 Which of these dissolves in water? (a) table salt (b) chalk powder (c) sand (d) cooking oil
37. 37.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) the youngest child (d) a grown-up
38. 38.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) dissolving salt (c) melting butter (d) folding paper
39. 39.True or false: table salt dissolves in water. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) glucose powder (b) table salt (c) food colour (d) cooking oil

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