Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 974 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a balloon (d) a spoon
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
3. 3.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) water evaporates (d) salt eats water
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) a shallow dish (d) a magnet
5. 5.⚖️ 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) 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 kept the same? (a) the amount of salt (b) days to see crystals (c) sunny or shady place
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
8. 8.True or false: cooking oil dissolves in water. (a) False (b) True
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a battery cell (c) salt (d) a spoon
10. 10.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) the youngest child (d) a grown-up
11. 11.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) freezing water (d) cooking an egg
12. 12.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) a battery cell (d) a shallow dish
13. 13.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to oil (d) it turns to butter
14. 14.⚖️ 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 change it (c) we keep it the same
15. 15.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
16. 16.True or false: melting butter is a change that can be undone. (a) False (b) True
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) a balloon (d) warm water
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
19. 19.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) yeast (c) a balloon (d) warm water
20. 20.🧈 Which of these is a change that can be undone? (a) rusting iron (b) melting ice (c) milk turning to curd (d) browning lemon ink
21. 21.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
22. 22.🔍 Which is the odd one out? (a) sawdust (b) glucose powder (c) baking soda (d) table salt
23. 23.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
24. 24.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sawdust (c) table salt (d) baking soda
25. 25.🔍 Which is the odd one out? (a) chalk powder (b) glucose powder (c) baking soda (d) sugar
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a mirror (c) warm water (d) salt
27. 27.🧂 Which of these does not dissolve in water? (a) food colour (b) glucose powder (c) sand (d) sugar
28. 28.⚖️ 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 kind of salt (c) days to see crystals (d) the amount of water
29. 29.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
30. 30.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a magnet (c) turmeric powder (d) a shallow dish
31. 31.True or false: food colour dissolves in water. (a) False (b) True
32. 32.True or false: sugar does not dissolve in water. (a) False (b) True
33. 33.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
34. 34.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
35. 35.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny cubes (c) tiny spheres (d) tiny triangles
36. 36.🔍 Which is the odd one out? (a) cooking oil (b) sugar (c) baking soda (d) food colour
37. 37.🔍 Which is the odd one out? (a) sawdust (b) chalk powder (c) sand (d) sugar
38. 38.True or false: melting ice is a change that can be undone. (a) True (b) False
39. 39.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
40. 40.⚖️ 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) the same dish (c) sunny or shady place (d) the amount of salt

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