Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 49 · 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 mirror is not needed for growing salt crystals. (a) True (b) False
2. 2.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
3. 3.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
4. 4.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) water evaporates (d) salt eats water
5. 5.⚖️ 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
6. 6.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
7. 7.⚖️ 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) True (b) False
8. 8.⚖️ 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 measure it (b) we keep it the same (c) we change it
9. 9.🧂 Which of these does not dissolve in water? (a) food colour (b) glucose powder (c) sugar (d) small pebbles
10. 10.🔍 Which is the odd one out? (a) sugar (b) sawdust (c) food colour (d) glucose powder
11. 11.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
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 water”? (a) we measure it (b) we change it (c) we keep it the same
13. 13.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
14. 14.True or false: baking soda dissolves in water. (a) False (b) True
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) False (b) True
16. 16.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
17. 17.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
18. 18.⚖️ 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
19. 19.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
20. 20.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we keep it the same (b) we measure it (c) we change it
22. 22.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) small pebbles (d) sugar
23. 23.True or false: glucose powder dissolves in water. (a) True (b) False
24. 24.⚖️ 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
25. 25.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
26. 26.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) folding paper (c) milk turning to curd (d) dissolving salt
27. 27.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a magnet (c) a piece of string (d) a shallow dish
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 what we measure. (a) False (b) True
29. 29.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) in a busy doorway (d) next to the baby
30. 30.🔍 Which is the odd one out? (a) glucose powder (b) table salt (c) sand (d) food colour
31. 31.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) liquid crystals (d) bigger crystals
32. 32.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a mirror (c) salt (d) a piece of string
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) False (b) True
35. 35.⚖️ 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
36. 36.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
37. 37.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
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) sunny or shady place (b) the same dish (c) days to see crystals
39. 39.True or false: table salt dissolves in water. (a) False (b) True
40. 40.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) turmeric powder (c) a piece of string (d) a magnet

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