Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 880 · 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.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) rusting iron (c) melting ice (d) browning lemon ink
2. 2.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a magnet (c) a battery cell (d) a mirror
3. 3.⚖️ 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
4. 4.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) salt crystals form (c) it turns to butter (d) sugar crystals form
5. 5.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) sugar (d) sand
6. 6.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
7. 7.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) salt grows roots (d) the dish melts
8. 8.🔍 Which is the odd one out? (a) sawdust (b) sugar (c) food colour (d) baking soda
9. 9.⚖️ 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 change it (b) we keep it the same (c) we measure it
10. 10.True or false: freezing water is a change that cannot be undone. (a) True (b) False
11. 11.⚖️ 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) sunny or shady place (b) days to see crystals (c) the amount of water (d) the amount of salt
12. 12.⚖️ 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 same dish (c) days to see crystals (d) the kind of salt
13. 13.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) table salt (d) food colour
14. 14.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
15. 15.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
16. 16.⚖️ 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
17. 17.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny cubes (d) tiny spheres
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the same dish
19. 19.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
20. 20.True or false: baking soda dissolves in water. (a) False (b) True
21. 21.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
22. 22.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) browning lemon ink (c) melting ice (d) melting butter
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a piece of string (d) a magnet
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a balloon (c) a piece of string (d) a spoon
25. 25.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) freezing water (d) rusting iron
26. 26.True or false: dissolving salt is a change that can be undone. (a) False (b) True
27. 27.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
28. 28.True or false: sawdust does not dissolve in water. (a) False (b) True
29. 29.True or false: sugar dissolves in water. (a) True (b) False
30. 30.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
31. 31.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) cooking an egg (d) folding paper
32. 32.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
33. 33.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
34. 34.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
35. 35.🧂 Which of these dissolves in water? (a) baking soda (b) sawdust (c) chalk powder (d) sand
36. 36.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
37. 37.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a piece of string (d) turmeric powder
39. 39.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
40. 40.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed

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