Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 197 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a mirror (d) a piece of string
3. 3.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
4. 4.True or false: sugar does not dissolve in water. (a) False (b) True
5. 5.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) salt (d) a balloon
6. 6.🧈 Which of these is a change that can be undone? (a) rusting iron (b) freezing water (c) browning lemon ink (d) baking a cake
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a battery cell (d) salt
8. 8.🔍 Which is the odd one out? (a) small pebbles (b) sugar (c) chalk powder (d) sawdust
9. 9.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) liquid crystals (d) bigger crystals
10. 10.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) safe from small children (d) next to the baby
11. 11.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) melting butter (c) dissolving salt (d) melting ice
12. 12.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
13. 13.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) a friend who is running (d) nobody needs to
14. 14.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) browning lemon ink (c) folding paper (d) melting ice
15. 15.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
16. 16.True or false: melting butter is a change that cannot be undone. (a) True (b) False
17. 17.🧈 Which of these is a change that can be undone? (a) rusting iron (b) milk turning to curd (c) dissolving salt (d) baking a cake
18. 18.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
19. 19.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
21. 21.⚖️ 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
22. 22.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
23. 23.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) the dish melts (c) salt eats water (d) salt grows roots
24. 24.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) fish make it (c) sea water evaporates (d) salt rains down
25. 25.True or false: small pebbles does not dissolve in water. (a) False (b) True
26. 26.⚖️ 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) False (b) True
27. 27.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) a spoon (d) yeast
28. 28.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) melting butter (c) melting ice (d) dissolving salt
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) a piece of string (c) a spoon (d) a shallow dish
30. 30.⚖️ 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 amount of salt (b) the amount of water (c) days to see crystals (d) sunny or shady place
31. 31.⚖️ 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
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a balloon (c) a piece of string (d) a shallow dish
33. 33.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
34. 34.🧈 Which of these is a change that can be undone? (a) baking a cake (b) milk turning to curd (c) melting ice (d) cooking an egg
35. 35.True or false: freezing water is a change that cannot be undone. (a) False (b) True
36. 36.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) sugar (b) food colour (c) sawdust (d) table salt
38. 38.⚖️ 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
39. 39.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.🔍 Which is the odd one out? (a) sawdust (b) sand (c) cooking oil (d) table salt

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