Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 200 · 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.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
2. 2.True or false: food colour does not dissolve in water. (a) True (b) False
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a balloon (d) warm water
4. 4.🧂 Which of these dissolves in water? (a) chalk powder (b) cooking oil (c) sawdust (d) glucose powder
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
6. 6.⚖️ 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
7. 7.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) turmeric powder (c) warm water (d) a piece of string
9. 9.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
10. 10.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) baking a cake (c) melting ice (d) milk turning to curd
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a magnet (d) a piece of string
12. 12.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) dissolving salt (c) freezing water (d) folding paper
13. 13.⚖️ 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 change it (c) we measure it
14. 14.⚖️ 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
15. 15.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) chalk powder (d) sugar
16. 16.True or false: sawdust does not dissolve in water. (a) True (b) False
17. 17.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny triangles (c) tiny spheres (d) tiny stars
18. 18.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
19. 19.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) a shallow dish (d) yeast
20. 20.🔍 Which is the odd one out? (a) chalk powder (b) food colour (c) sand (d) cooking oil
21. 21.⚖️ 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 change it (c) we keep it the same
22. 22.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) a piece of string (d) a magnet
23. 23.⚖️ 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) the amount of salt (c) sunny or shady place
24. 24.⚖️ 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
25. 25.⚖️ 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) days to see crystals (c) the amount of water (d) the same dish
26. 26.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
27. 27.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
28. 28.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
29. 29.True or false: warm water is needed for growing salt crystals. (a) False (b) True
30. 30.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
31. 31.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it turns sweet (d) it fizzes
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a piece of string (c) a mirror (d) a shallow dish
33. 33.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
34. 34.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
35. 35.🧺 Do we need salt 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? True or false: days to see crystals is the one thing we change. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) sand (d) table salt
38. 38.True or false: chalk powder does not dissolve in water. (a) True (b) False
39. 39.🔍 Which is the odd one out? (a) sugar (b) table salt (c) small pebbles (d) food colour
40. 40.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed

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