Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 629 · 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.⚖️ 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 measure it (c) we keep it the same
2. 2.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
3. 3.🛟 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
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
5. 5.⚖️ 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) sunny or shady place (c) days to see crystals
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
7. 7.🔍 Which is the odd one out? (a) sugar (b) table salt (c) sand (d) food colour
8. 8.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
9. 9.⚖️ 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 measure it (c) we change it
10. 10.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) turmeric powder (c) a battery cell (d) yeast
11. 11.🧂 Which of these does not dissolve in water? (a) baking soda (b) cooking oil (c) food colour (d) sugar
12. 12.⚖️ 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) False (b) True
13. 13.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) melting butter (c) rusting iron (d) browning lemon ink
14. 14.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) no crystals (d) bigger crystals
15. 15.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) few or no crystals (d) it fizzes
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) yeast (c) warm water (d) a shallow dish
17. 17.⚖️ 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
18. 18.True or false: cooking oil dissolves in water. (a) False (b) True
19. 19.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
20. 20.True or false: turmeric powder is not 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? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
22. 22.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) melting butter (d) browning lemon ink
23. 23.⚖️ 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) 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) the amount of salt (c) the same dish (d) sunny or shady place
25. 25.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) next to the baby (d) on the edge of a table
26. 26.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) freezing water (c) rusting iron (d) cooking an egg
27. 27.⚖️ 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 same dish (b) the kind of salt (c) days to see crystals (d) the amount of water
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) False (b) True
29. 29.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
30. 30.True or false: chalk powder does not dissolve in water. (a) True (b) False
31. 31.True or false: baking soda dissolves in water. (a) False (b) True
32. 32.True or false: table salt does not dissolve in water. (a) True (b) False
33. 33.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) saturated (d) magnetic
34. 34.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sand is ground up (d) sea water evaporates
35. 35.True or false: melting butter is a change that cannot be undone. (a) True (b) False
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 kept the same. (a) True (b) False
37. 37.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) yeast (d) a piece of string
38. 38.True or false: melting butter is a change that can be undone. (a) True (b) False
39. 39.True or false: sand dissolves in water. (a) False (b) True
40. 40.⚖️ 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 measure it (b) we change it (c) we keep it the same

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