Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 636 · 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.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
2. 2.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
3. 3.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) on the edge of a table (d) in a busy doorway
4. 4.⚖️ 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
5. 5.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) it fizzes (d) crystals grow faster
6. 6.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) bigger crystals (d) smaller crystals
7. 7.True or false: melting ice is a change that cannot be undone. (a) True (b) False
8. 8.⚖️ 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 keep it the same (c) we measure it
9. 9.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
10. 10.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) warm water (d) turmeric powder
12. 12.⚖️ 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 amount of salt (b) sunny or shady place (c) the kind of salt (d) days to see crystals
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a balloon (c) a spoon (d) a piece of string
14. 14.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) salt eats water (d) the dish melts
15. 15.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) cooking oil (d) sugar
16. 16.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a battery cell (c) a mirror (d) a magnet
17. 17.🧈 Which of these is a change that can be undone? (a) rusting iron (b) freezing water (c) cooking an egg (d) baking a cake
18. 18.True or false: dissolving salt is a change that can be undone. (a) False (b) True
19. 19.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
20. 20.🧈 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
21. 21.🧂 Which of these does not dissolve in water? (a) table salt (b) chalk powder (c) glucose powder (d) sugar
22. 22.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
23. 23.⚖️ 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) the amount of water (c) sunny or shady place
24. 24.True or false: cooking an egg is a change that can be undone. (a) True (b) False
25. 25.⚖️ 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
26. 26.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
27. 27.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) frozen (c) empty (d) saturated
28. 28.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) a balloon (d) salt
29. 29.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
30. 30.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a balloon (c) yeast (d) turmeric powder
31. 31.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
32. 32.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
33. 33.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to make it very salty (d) to cool the water
34. 34.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
35. 35.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) dissolving salt (d) rusting iron
36. 36.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny cubes (c) tiny stars (d) tiny triangles
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
38. 38.True or false: sugar does not dissolve in water. (a) False (b) True
39. 39.⚖️ 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
40. 40.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve

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