Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 190 · 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 a battery cell for growing salt crystals? (a) needed (b) not needed
2. 2.⚖️ 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 salt (c) sunny or shady place (d) the kind of salt
3. 3.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
4. 4.⚖️ 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) the same dish (d) the amount of water
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a battery cell (d) a shallow dish
6. 6.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) saturated (c) empty (d) magnetic
7. 7.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
8. 8.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) dissolving salt (c) freezing water (d) cooking an egg
9. 9.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a balloon (c) a piece of string (d) a battery cell
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a spoon (c) a balloon (d) warm water
12. 12.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
13. 13.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
14. 14.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
15. 15.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) salt (d) a balloon
17. 17.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
18. 18.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to make it very salty (c) to cool the water (d) to change its colour
19. 19.⚖️ 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 change it (b) we keep it the same (c) we measure it
20. 20.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
21. 21.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) browning lemon ink (c) dissolving salt (d) baking a cake
22. 22.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
23. 23.⚖️ 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 measure it (c) we change it
24. 24.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) no crystals (d) smaller crystals
25. 25.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
26. 26.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
27. 27.⚖️ 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 keep it the same (b) we measure it (c) we change it
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a piece of string (d) a magnet
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
30. 30.⚖️ 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 water (b) sunny or shady place (c) days to see crystals
31. 31.⚖️ 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 measure it (b) we keep it the same (c) we change it
32. 32.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) turmeric powder (c) a shallow dish (d) warm water
34. 34.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
35. 35.⚖️ 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 kind of salt (c) sunny or shady place
36. 36.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a mirror (c) yeast (d) turmeric powder
37. 37.⚖️ 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
38. 38.True or false: cooking oil does not dissolve in water. (a) False (b) True
39. 39.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) salt (d) yeast

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