Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 931 · 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 is the odd one out? (a) sawdust (b) food colour (c) glucose powder (d) table salt
2. 2.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
3. 3.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) warm water (c) a battery cell (d) yeast
4. 4.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) no crystals (d) smaller crystals
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) yeast (c) warm water (d) a shallow dish
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 measure it (c) we change it
7. 7.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) it turns to butter (d) sugar crystals form
8. 8.⚖️ 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
9. 9.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
10. 10.⚖️ 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 measure it (c) we keep it the same
11. 11.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) rusting iron (c) browning lemon ink (d) melting butter
12. 12.True or false: rusting iron is a change that can be undone. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) sand (b) sawdust (c) food colour (d) cooking oil
14. 14.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
15. 15.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
16. 16.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
17. 17.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
18. 18.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) in a busy doorway (d) safe from small children
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) True (b) False
20. 20.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) small pebbles (d) baking soda
21. 21.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) yeast (c) a shallow dish (d) a mirror
22. 22.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a magnet (c) a battery cell (d) salt
23. 23.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
24. 24.⚖️ 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 kind of salt (b) sunny or shady place (c) the amount of salt (d) the amount of water
25. 25.True or false: cooking an egg is a change that can be undone. (a) False (b) True
26. 26.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) dissolving salt (c) folding paper (d) freezing water
27. 27.True or false: baking a cake is a change that can be undone. (a) False (b) True
28. 28.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) it fizzes (d) few or no crystals
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a shallow dish (c) a balloon (d) a piece of string
30. 30.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
31. 31.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) rusting iron (d) melting ice
32. 32.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
33. 33.⚖️ 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 keep it the same (c) we change it
34. 34.🔍 Which is the odd one out? (a) table salt (b) chalk powder (c) small pebbles (d) sand
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a shallow dish (d) yeast
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False
37. 37.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
38. 38.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
39. 39.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
40. 40.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve

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