Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 302 · 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.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
2. 2.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) baking a cake (c) milk turning to curd (d) melting butter
3. 3.⚖️ 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) sunny or shady place (c) days to see crystals
4. 4.⚖️ 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
5. 5.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
6. 6.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
7. 7.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
8. 8.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) it turns to oil (d) sugar crystals form
9. 9.True or false: yeast is needed for growing salt crystals. (a) True (b) False
10. 10.🧈 Which of these is a change that can be undone? (a) melting ice (b) milk turning to curd (c) cooking an egg (d) browning lemon ink
11. 11.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
12. 12.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to make it fizz (d) to cool the water
13. 13.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
14. 14.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) the dish melts (d) water evaporates
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a magnet (c) a piece of string (d) salt
16. 16.⚖️ 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 water (b) sunny or shady place (c) days to see crystals
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) a mirror (d) warm water
18. 18.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
19. 19.🧺 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
20. 20.⚖️ 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 change it (c) we measure it
21. 21.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
22. 22.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
23. 23.⚖️ 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
24. 24.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
25. 25.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
26. 26.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
27. 27.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) chalk powder (d) sugar
28. 28.🔍 Which is the odd one out? (a) sand (b) cooking oil (c) sugar (d) sawdust
29. 29.🔍 Which is the odd one out? (a) chalk powder (b) cooking oil (c) baking soda (d) small pebbles
30. 30.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) freezing water (c) melting butter (d) melting ice
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
32. 32.🧺 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
33. 33.⚖️ 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 measure it (b) we change it (c) we keep it the same
34. 34.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
35. 35.True or false: melting butter is a change that can be undone. (a) True (b) False
36. 36.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) False (b) True
38. 38.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) salt (c) a balloon (d) a magnet
39. 39.🔍 Which is the odd one out? (a) food colour (b) sugar (c) sawdust (d) table salt
40. 40.⚖️ 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 same dish (c) the amount of water (d) days to see crystals

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