Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 721 · 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 magnet for growing salt crystals? (a) not needed (b) needed
2. 2.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) a balloon (d) salt
3. 3.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) sugar crystals form (d) it turns to butter
4. 4.🧈 Which of these is a change that can be undone? (a) rusting iron (b) dissolving salt (c) browning lemon ink (d) cooking an egg
5. 5.⚖️ 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 water (b) sunny or shady place (c) days to see crystals (d) the amount of salt
6. 6.True or false: food colour does not dissolve in water. (a) True (b) False
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the amount of water
8. 8.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
9. 9.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) melting ice (c) folding paper (d) melting butter
10. 10.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) saturated (c) frozen (d) empty
11. 11.🧺 Which of these is needed for growing salt crystals? (a) salt (b) turmeric powder (c) a balloon (d) a magnet
12. 12.⚖️ 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) True (b) False
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a spoon (d) a balloon
14. 14.🛟 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
15. 15.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
16. 16.⚖️ 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
17. 17.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
18. 18.🔍 Which is the odd one out? (a) table salt (b) small pebbles (c) sawdust (d) chalk powder
19. 19.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) warm water (c) turmeric powder (d) a mirror
20. 20.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
21. 21.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) the youngest child (d) nobody needs to
22. 22.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) sugar (d) cooking oil
23. 23.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
24. 24.⚖️ 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 kind of salt (b) days to see crystals (c) the amount of water (d) the amount of salt
25. 25.⚖️ 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 keep it the same (b) we measure it (c) we change it
26. 26.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
27. 27.⚖️ 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 change it (c) we measure it
28. 28.🌊 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
29. 29.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
30. 30.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
31. 31.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) turmeric powder (c) a spoon (d) warm water
33. 33.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) cooking an egg (c) freezing water (d) dissolving salt
34. 34.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a balloon (c) a magnet (d) a spoon
35. 35.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) yeast (c) a shallow dish (d) a balloon
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a mirror (d) a shallow dish
37. 37.🧂 Which of these dissolves in water? (a) cooking oil (b) sugar (c) small pebbles (d) chalk powder
38. 38.🔍 Which is the odd one out? (a) baking soda (b) table salt (c) sugar (d) sand
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) salt (c) a shallow dish (d) a spoon
40. 40.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed

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