Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 402 · 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? What do we do with “the amount of salt”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
3. 3.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
4. 4.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
5. 5.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
6. 6.⚖️ 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 same dish (b) sunny or shady place (c) the amount of water (d) the kind of salt
7. 7.True or false: melting ice is a change that cannot be undone. (a) True (b) False
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a piece of string (c) salt (d) a spoon
9. 9.🧈 Which of these is a change that can be undone? (a) baking a cake (b) melting butter (c) milk turning to curd (d) browning lemon ink
10. 10.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) fish make it (c) sea water evaporates (d) salt rains down
11. 11.⚖️ 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 measure it (b) we keep it the same (c) we change it
12. 12.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
13. 13.True or false: chalk powder dissolves in water. (a) False (b) True
14. 14.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
15. 15.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
16. 16.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) melting butter (c) dissolving salt (d) melting ice
17. 17.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) water evaporates (d) the dish melts
18. 18.🔍 Which is the odd one out? (a) cooking oil (b) food colour (c) table salt (d) glucose powder
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) salt
20. 20.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
21. 21.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting ice (c) dissolving salt (d) browning lemon ink
22. 22.True or false: freezing water is a change that cannot be undone. (a) True (b) False
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a battery cell (c) a shallow dish (d) salt
24. 24.True or false: baking soda does not dissolve in water. (a) True (b) False
25. 25.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) small pebbles (d) glucose powder
26. 26.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
27. 27.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
28. 28.🧂 Which of these does not dissolve in water? (a) baking soda (b) chalk powder (c) glucose powder (d) sugar
29. 29.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a shallow dish (c) yeast (d) turmeric powder
30. 30.⚖️ 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
31. 31.🧈 Which of these is a change that can be undone? (a) melting ice (b) baking a cake (c) milk turning to curd (d) browning lemon ink
32. 32.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
33. 33.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
34. 34.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) empty (d) saturated
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) the same dish (b) days to see crystals (c) sunny or shady place
36. 36.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) sugar (d) chalk powder
37. 37.🛟 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
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) days to see crystals (c) the amount of salt (d) the same dish
39. 39.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
40. 40.🔮 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

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