Salt Crystal Experiment Worksheet

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

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