Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 785 · 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.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the kind of salt (c) sunny or shady place (d) the amount of salt
3. 3.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
4. 4.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
5. 5.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
6. 6.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a spoon (c) a mirror (d) yeast
7. 7.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) True (b) False
9. 9.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) crystals grow faster (d) it turns sweet
10. 10.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) folding paper (d) browning lemon ink
11. 11.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) saturated (d) magnetic
12. 12.🧂 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
13. 13.🧂 Which of these does not dissolve in water? (a) chalk powder (b) food colour (c) sugar (d) table salt
14. 14.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) no crystals (d) smaller crystals
15. 15.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) sugar (d) chalk powder
16. 16.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
17. 17.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) baking soda (d) sawdust
18. 18.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
19. 19.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
20. 20.True or false: chalk powder does not dissolve in water. (a) True (b) False
21. 21.True or false: baking soda does not dissolve in water. (a) False (b) True
22. 22.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
23. 23.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) in a busy doorway (d) next to the baby
24. 24.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
25. 25.⚖️ 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
26. 26.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
27. 27.⚖️ 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) True (b) False
28. 28.🔍 Which is the odd one out? (a) sawdust (b) cooking oil (c) sand (d) food colour
29. 29.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) it turns to oil (d) salt crystals form
30. 30.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a balloon (c) a piece of string (d) a shallow dish
32. 32.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
33. 33.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
34. 34.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) salt (d) turmeric powder
35. 35.🧂 Which of these does not dissolve in water? (a) table salt (b) food colour (c) sawdust (d) sugar
36. 36.⚖️ 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 change it (c) we keep it the same
37. 37.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) a battery cell (c) a mirror (d) yeast
38. 38.⚖️ 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 change it (b) we measure it (c) we keep it the same
39. 39.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
40. 40.⚖️ 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

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