Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 370 · 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.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
2. 2.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
3. 3.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) warm water (d) a battery cell
5. 5.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it fizzes (d) it turns sweet
6. 6.⚖️ 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
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a magnet (d) salt
8. 8.⚖️ 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
9. 9.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting butter (c) browning lemon ink (d) dissolving salt
10. 10.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) sugar (d) sand
11. 11.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny cubes (c) tiny spheres (d) tiny triangles
12. 12.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
13. 13.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
14. 14.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
15. 15.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) melting butter (d) rusting iron
16. 16.⚖️ 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
17. 17.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) sea water evaporates (c) fish make it (d) salt rains down
18. 18.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a piece of string (c) a battery cell (d) warm water
19. 19.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
20. 20.⚖️ 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 change it (b) we measure it (c) we keep it the same
21. 21.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) in a busy doorway (d) on the edge of a table
22. 22.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) cooking an egg (d) melting butter
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) True (b) False
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a mirror (d) a spoon
25. 25.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) sand (d) glucose powder
26. 26.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
27. 27.⚖️ 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) the kind of salt (c) the amount of water (d) the same dish
28. 28.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
29. 29.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) salt eats water (d) the dish melts
30. 30.True or false: melting ice is a change that can be undone. (a) True (b) False
31. 31.🧂 Which of these does not dissolve in water? (a) cooking oil (b) table salt (c) sugar (d) glucose powder
32. 32.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
33. 33.True or false: salt is not needed for growing salt crystals. (a) True (b) False
34. 34.True or false: rusting iron is a change that can be undone. (a) False (b) True
35. 35.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
36. 36.🧈 Which of these is a change that can be undone? (a) freezing water (b) rusting iron (c) browning lemon ink (d) milk turning to curd
37. 37.True or false: small pebbles dissolves in water. (a) True (b) False
38. 38.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) yeast (c) a mirror (d) a shallow dish
39. 39.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
40. 40.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a balloon (c) a battery cell (d) warm water

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