Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 592 · 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.🧂 Which of these dissolves in water? (a) small pebbles (b) glucose powder (c) sand (d) sawdust
2. 2.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) salt rains down (c) sand is ground up (d) fish make it
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a balloon (d) a shallow dish
4. 4.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
5. 5.⚖️ 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
6. 6.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) salt eats water (d) the dish melts
7. 7.🧂 Which of these dissolves in water? (a) chalk powder (b) table salt (c) cooking oil (d) sawdust
8. 8.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) yeast (c) salt (d) a battery cell
9. 9.🛟 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
10. 10.🔮 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
11. 11.True or false: rusting iron is a change that can be undone. (a) True (b) False
12. 12.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
14. 14.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) few or no crystals (d) it turns sweet
15. 15.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
16. 16.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
17. 17.True or false: table salt dissolves in water. (a) True (b) False
18. 18.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
19. 19.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
20. 20.⚖️ 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) the same dish (c) days to see crystals (d) the kind of salt
21. 21.True or false: cooking oil dissolves in water. (a) True (b) False
22. 22.🔍 Which is the odd one out? (a) sugar (b) cooking oil (c) food colour (d) table salt
23. 23.⚖️ 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) False (b) True
24. 24.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
25. 25.🧂 Which of these dissolves in water? (a) small pebbles (b) cooking oil (c) sand (d) baking soda
26. 26.🧂 Which of these dissolves in water? (a) chalk powder (b) cooking oil (c) sawdust (d) sugar
27. 27.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
28. 28.🧈 Which of these is a change that can be undone? (a) freezing water (b) baking a cake (c) milk turning to curd (d) browning lemon ink
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a battery cell (c) a shallow dish (d) salt
30. 30.🧂 Which of these does not dissolve in water? (a) baking soda (b) sand (c) food colour (d) sugar
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the amount of water
32. 32.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
33. 33.True or false: glucose powder does not dissolve in water. (a) False (b) True
34. 34.🧂 Which of these does not dissolve in water? (a) chalk powder (b) baking soda (c) glucose powder (d) food colour
35. 35.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the kind of salt (c) sunny or shady place (d) the amount of water
37. 37.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a shallow dish (c) warm water (d) a spoon
39. 39.⚖️ 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 measure it (b) we keep it the same (c) we change it
40. 40.🧂 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 fizz (d) to make it very salty

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