Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 516 · 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.🔍 Which is the odd one out? (a) sawdust (b) chalk powder (c) cooking oil (d) food colour
2. 2.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to cool the water (c) to make it fizz (d) to change its colour
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) turmeric powder (d) a piece of string
4. 4.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
5. 5.⚖️ 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
6. 6.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a balloon (d) a spoon
8. 8.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) magnetic (d) empty
9. 9.True or false: cooking oil dissolves in water. (a) False (b) True
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a piece of string (d) a magnet
11. 11.⚖️ 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) sunny or shady place (c) the amount of salt (d) the amount of water
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a spoon (c) a shallow dish (d) salt
13. 13.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
14. 14.⚖️ 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
15. 15.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
16. 16.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
17. 17.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) folding paper (c) melting butter (d) baking a cake
18. 18.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
19. 19.True or false: yeast is needed for growing salt crystals. (a) True (b) False
20. 20.🧂 Which of these does not dissolve in water? (a) small pebbles (b) table salt (c) food colour (d) baking soda
21. 21.True or false: salt is needed for growing salt crystals. (a) False (b) True
22. 22.🧂 Which of these does not dissolve in water? (a) sugar (b) sawdust (c) baking soda (d) table salt
23. 23.⚖️ 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 amount of salt (b) the kind of salt (c) sunny or shady place (d) the amount of water
24. 24.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
25. 25.🧂 Which of these does not dissolve in water? (a) sugar (b) food colour (c) sand (d) table salt
26. 26.⚖️ 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 keep it the same (b) we change it (c) we measure it
27. 27.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
28. 28.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
29. 29.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) warm water (c) a magnet (d) yeast
30. 30.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) yeast (c) salt (d) a shallow dish
32. 32.True or false: melting butter is a change that can be undone. (a) True (b) False
33. 33.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) next to the baby (d) safe from small children
34. 34.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
35. 35.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
36. 36.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) freezing water (c) baking a cake (d) cooking an egg
37. 37.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a balloon (c) yeast (d) a shallow dish
38. 38.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) cooking oil (b) chalk powder (c) glucose powder (d) sawdust
40. 40.True or false: baking soda does not dissolve in water. (a) False (b) True

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