Salt Crystal Experiment Worksheet

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

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