Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 857 · 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 amount of water”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) a shallow dish (c) a spoon (d) a piece of string
3. 3.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
4. 4.🧂 Which of these dissolves in water? (a) cooking oil (b) glucose powder (c) chalk powder (d) sawdust
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
6. 6.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a magnet (c) a shallow dish (d) warm water
8. 8.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny spheres (c) tiny stars (d) tiny cubes
9. 9.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) sea water evaporates (c) salt rains down (d) fish make it
10. 10.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) the youngest child (d) nobody needs to
11. 11.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) in a busy doorway (d) on the edge of a table
12. 12.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) it turns to butter (d) salt crystals form
13. 13.True or false: small pebbles does not dissolve in water. (a) False (b) True
14. 14.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it fizz (c) to change its colour (d) to make it very salty
15. 15.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) bigger crystals (d) no crystals
16. 16.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
17. 17.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
18. 18.True or false: melting butter is a change that cannot be undone. (a) False (b) True
19. 19.⚖️ 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
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) sugar (b) small pebbles (c) table salt (d) food colour
22. 22.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
23. 23.🔍 Which is the odd one out? (a) sand (b) sugar (c) glucose powder (d) table salt
24. 24.🧂 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) sand (d) food colour
25. 25.🧈 Which of these is a change that can be undone? (a) melting butter (b) milk turning to curd (c) rusting iron (d) browning lemon ink
26. 26.⚖️ 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 salt (c) sunny or shady place
27. 27.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
28. 28.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
29. 29.🔍 Which is the odd one out? (a) small pebbles (b) sawdust (c) chalk powder (d) food colour
30. 30.True or false: warm water is needed for growing salt crystals. (a) False (b) True
31. 31.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a spoon (c) warm water (d) a shallow dish
33. 33.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
34. 34.⚖️ 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
35. 35.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
36. 36.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
37. 37.⚖️ 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 amount of salt (b) days to see crystals (c) sunny or shady place (d) the kind of salt
38. 38.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a piece of string (d) a magnet
39. 39.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
40. 40.🧈 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

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