Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 101 · 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.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
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) the kind of salt (b) days to see crystals (c) the amount of salt (d) sunny or shady place
3. 3.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
4. 4.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) salt eats water (d) water evaporates
5. 5.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it fizz (d) to make it very salty
6. 6.🔍 Which is the odd one out? (a) chalk powder (b) sugar (c) small pebbles (d) sand
7. 7.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) turmeric powder (c) salt (d) warm water
9. 9.🧂 Which of these dissolves in water? (a) sawdust (b) chalk powder (c) cooking oil (d) food colour
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a mirror (d) a shallow dish
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) yeast (c) a spoon (d) salt
12. 12.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
13. 13.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) a friend who is running (d) the youngest child
14. 14.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a shallow dish (c) yeast (d) a mirror
15. 15.🧂 Which of these dissolves in water? (a) glucose powder (b) sand (c) sawdust (d) cooking oil
16. 16.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
17. 17.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
18. 18.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny cubes (d) tiny triangles
19. 19.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) salt (d) a mirror
20. 20.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) next to the baby (d) in a busy doorway
21. 21.True or false: dissolving salt is a change that can be undone. (a) False (b) True
22. 22.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
23. 23.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) cooking oil (d) baking soda
24. 24.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
25. 25.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) a mirror (d) salt
26. 26.True or false: chalk powder dissolves in water. (a) True (b) False
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a battery cell (d) salt
28. 28.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
29. 29.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) smaller crystals (d) no crystals
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) sunny or shady place (b) the amount of salt (c) days to see crystals
31. 31.🔍 Which is the odd one out? (a) table salt (b) sugar (c) glucose powder (d) small pebbles
32. 32.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
33. 33.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
34. 34.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) crystals grow faster (d) few or no crystals
35. 35.⚖️ 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 measure it (c) we change it
36. 36.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) a spoon (c) salt (d) warm water
38. 38.⚖️ 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 measure it (c) we keep it the same
39. 39.⚖️ 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) days to see crystals
40. 40.⚖️ 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 measure it (b) we keep it the same (c) we change it

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