Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 296 · 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.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sea water evaporates (c) sand is ground up (d) salt rains down
2. 2.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) a spoon (d) a battery cell
3. 3.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
4. 4.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
5. 5.⚖️ 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) sunny or shady place (c) days to see crystals (d) the amount of salt
6. 6.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt eats water (d) salt grows roots
7. 7.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) turmeric powder (c) salt (d) warm water
8. 8.True or false: sugar does not dissolve in water. (a) False (b) True
9. 9.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) sugar crystals form (d) it turns to oil
10. 10.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
11. 11.⚖️ 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) the kind of salt (c) days to see crystals
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a shallow dish (d) turmeric powder
13. 13.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) cooking oil (d) baking soda
14. 14.⚖️ 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) False (b) True
15. 15.True or false: chalk powder dissolves in water. (a) False (b) True
16. 16.⚖️ 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) False (b) True
17. 17.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
18. 18.⚖️ 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 measure it (b) we change it (c) we keep it the same
19. 19.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) few or no crystals (d) it fizzes
20. 20.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
21. 21.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
22. 22.🛟 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
23. 23.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) dissolving salt (d) baking a cake
24. 24.⚖️ 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 measure it (c) we change it
25. 25.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny stars (d) tiny cubes
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a balloon (c) salt (d) a shallow dish
27. 27.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
28. 28.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) a mirror (d) salt
30. 30.⚖️ 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
31. 31.True or false: cooking oil does not dissolve in water. (a) True (b) False
32. 32.True or false: freezing water is a change that can be undone. (a) False (b) True
33. 33.True or false: warm water is needed for growing salt crystals. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) food colour (b) table salt (c) small pebbles (d) sugar
35. 35.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) dissolving salt (d) cooking an egg
36. 36.⚖️ 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 measure it (c) we keep it the same
37. 37.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) salt (c) warm water (d) a shallow dish
39. 39.True or false: melting butter is a change that cannot be undone. (a) True (b) False
40. 40.⚖️ 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

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