Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 301 · 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 spoon (b) salt (c) a balloon (d) a shallow dish
2. 2.⚖️ 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) sunny or shady place (d) the amount of salt
3. 3.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
4. 4.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
5. 5.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
6. 6.True or false: yeast is needed for growing salt crystals. (a) True (b) False
7. 7.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) baking a cake (d) dissolving salt
8. 8.⚖️ 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
9. 9.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sand is ground up (c) sea water evaporates (d) salt rains down
10. 10.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
11. 11.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) freezing water (c) melting ice (d) baking a cake
12. 12.🔍 Which is the odd one out? (a) cooking oil (b) glucose powder (c) sawdust (d) sand
13. 13.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) melting ice (d) browning lemon ink
14. 14.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny triangles (d) tiny stars
15. 15.⚖️ 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 keep it the same (c) we measure it
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) True (b) False
17. 17.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
18. 18.🔍 Which is the odd one out? (a) table salt (b) sugar (c) cooking oil (d) baking soda
19. 19.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) it turns sweet (d) few or no crystals
20. 20.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) a piece of string (c) salt (d) a shallow dish
21. 21.True or false: salt is needed for growing salt crystals. (a) True (b) False
22. 22.🧂 Which of these dissolves in water? (a) small pebbles (b) cooking oil (c) glucose powder (d) sawdust
23. 23.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
24. 24.🧈 Which of these is a change that can be undone? (a) rusting iron (b) folding paper (c) baking a cake (d) cooking an egg
25. 25.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) warm water (d) yeast
27. 27.🔍 Which is the odd one out? (a) small pebbles (b) sawdust (c) chalk powder (d) table salt
28. 28.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) rusting iron (d) freezing water
29. 29.True or false: dissolving salt is a change that can be undone. (a) True (b) False
30. 30.⚖️ 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
31. 31.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a piece of string (c) a spoon (d) salt
33. 33.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) milk turning to curd (d) melting butter
34. 34.⚖️ 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 change it (c) we measure it
35. 35.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
36. 36.⚖️ 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) the kind of salt (c) sunny or shady place (d) days to see crystals
37. 37.True or false: sand dissolves in water. (a) True (b) False
38. 38.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) sugar (d) sand
39. 39.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
40. 40.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) nobody needs to (d) the youngest child

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