Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 23 · 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.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
2. 2.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a piece of string (c) salt (d) a mirror
3. 3.True or false: melting ice is a change that can be undone. (a) True (b) False
4. 4.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
5. 5.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
6. 6.🔍 Which is the odd one out? (a) sugar (b) cooking oil (c) food colour (d) table salt
7. 7.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
8. 8.True or false: folding paper is a change that can be undone. (a) False (b) True
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the same dish (c) the kind of salt (d) days to see crystals
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
11. 11.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) baking a cake (c) rusting iron (d) melting ice
12. 12.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
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.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) rusting iron (d) dissolving salt
15. 15.🔍 Which is the odd one out? (a) small pebbles (b) cooking oil (c) sawdust (d) table salt
16. 16.⚖️ 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 change it (b) we keep it the same (c) we measure it
17. 17.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
18. 18.🛟 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
19. 19.🧂 Which of these dissolves in water? (a) food colour (b) small pebbles (c) cooking oil (d) sawdust
20. 20.⚖️ 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 water (c) sunny or shady place
21. 21.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) the dish melts (d) water evaporates
22. 22.⚖️ 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 change it (b) we keep it the same (c) we measure it
23. 23.⚖️ 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 measure it (b) we keep it the same (c) we change it
24. 24.⚖️ 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
25. 25.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) empty (c) frozen (d) magnetic
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) salt (c) a spoon (d) warm water
27. 27.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) liquid crystals (d) smaller crystals
28. 28.⚖️ 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 keep it the same (c) we change it
29. 29.True or false: table salt dissolves in water. (a) True (b) False
30. 30.⚖️ 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) True (b) False
31. 31.🧂 Which of these does not dissolve in water? (a) glucose powder (b) food colour (c) sawdust (d) sugar
32. 32.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
33. 33.⚖️ 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
34. 34.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
35. 35.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
36. 36.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) warm water (d) a battery cell
38. 38.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) baking soda (d) food colour
39. 39.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
40. 40.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) melting butter (d) baking a cake

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