Salt Crystal Experiment Worksheet

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

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