Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 475 · 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 mirror for growing salt crystals? (a) needed (b) not needed
2. 2.🔍 Which is the odd one out? (a) food colour (b) table salt (c) small pebbles (d) sugar
3. 3.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
4. 4.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) glucose powder (d) sawdust
5. 5.🔍 Which is the odd one out? (a) food colour (b) sand (c) sugar (d) baking soda
6. 6.True or false: freezing water is a change that can be undone. (a) True (b) False
7. 7.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
8. 8.True or false: table salt dissolves in water. (a) False (b) True
9. 9.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) sawdust (d) food colour
10. 10.⚖️ 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) days to see crystals (c) the amount of salt
11. 11.⚖️ 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
12. 12.⚖️ 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
13. 13.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
14. 14.⚖️ 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
15. 15.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
16. 16.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) turmeric powder (c) a mirror (d) a battery cell
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
18. 18.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
19. 19.🛟 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
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) yeast (c) salt (d) a piece of string
21. 21.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) a friend who is running (d) nobody needs to
22. 22.⚖️ 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
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 salt”? (a) we keep it the same (b) we measure it (c) we change it
24. 24.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) turmeric powder (c) warm water (d) yeast
25. 25.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
26. 26.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
27. 27.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) dissolving salt (d) cooking an egg
28. 28.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
29. 29.⚖️ 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 change it (c) we keep it the same
30. 30.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
31. 31.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) no crystals (d) liquid crystals
32. 32.True or false: table salt does not dissolve in water. (a) True (b) False
33. 33.🧂 Which of these dissolves in water? (a) glucose powder (b) chalk powder (c) cooking oil (d) small pebbles
34. 34.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
35. 35.⚖️ 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 keep it the same (b) we measure it (c) we change it
36. 36.🔍 Which is the odd one out? (a) table salt (b) small pebbles (c) sand (d) chalk powder
37. 37.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
39. 39.🧂 Which of these dissolves in water? (a) cooking oil (b) sawdust (c) chalk powder (d) sugar
40. 40.True or false: a mirror is needed for growing salt crystals. (a) True (b) False

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