Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 172 · 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) crystals grow faster (b) it turns sweet (c) it fizzes (d) few or no crystals
2. 2.⚖️ 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 amount of salt (b) the same dish (c) days to see crystals (d) sunny or shady place
3. 3.🧂 Which of these dissolves in water? (a) small pebbles (b) sugar (c) sawdust (d) chalk powder
4. 4.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
5. 5.🧺 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
6. 6.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
7. 7.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) water evaporates (d) salt grows roots
8. 8.⚖️ 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) days to see crystals (d) sunny or shady place
9. 9.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) freezing water (c) browning lemon ink (d) baking a cake
10. 10.⚖️ 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 measure it (c) we change it
11. 11.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
12. 12.🧂 Which of these does not dissolve in water? (a) baking soda (b) table salt (c) chalk powder (d) glucose powder
13. 13.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) next to the baby (d) safe from small children
14. 14.⚖️ 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 measure it (c) we keep it the same
15. 15.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) no crystals (d) smaller crystals
16. 16.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to make it very salty (d) to cool the water
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a shallow dish (c) salt (d) a spoon
18. 18.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a spoon (d) yeast
19. 19.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
20. 20.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a friend who is running (d) a grown-up
21. 21.⚖️ 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 keep it the same (c) we change it
22. 22.🔍 Which is the odd one out? (a) baking soda (b) cooking oil (c) sawdust (d) sand
23. 23.🔍 Which is the odd one out? (a) chalk powder (b) sugar (c) food colour (d) glucose powder
24. 24.True or false: melting butter is a change that can be undone. (a) True (b) False
25. 25.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
26. 26.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
27. 27.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) fish make it (c) salt rains down (d) sand is ground up
28. 28.True or false: folding paper is a change that cannot be undone. (a) False (b) True
29. 29.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) folding paper (d) browning lemon ink
30. 30.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) sawdust (d) glucose powder
31. 31.🔍 Which is the odd one out? (a) sawdust (b) small pebbles (c) sand (d) sugar
32. 32.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
33. 33.🧂 Which of these does not dissolve in water? (a) sugar (b) table salt (c) glucose powder (d) small pebbles
34. 34.🧂 Which of these dissolves in water? (a) chalk powder (b) small pebbles (c) sawdust (d) table salt
35. 35.⚖️ 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 salt
36. 36.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) baking a cake (c) freezing water (d) melting butter
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) turmeric powder (d) salt
38. 38.True or false: sugar does not dissolve in water. (a) True (b) False
39. 39.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed

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