Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 26 · 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.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) crystals grow faster (d) few or no crystals
2. 2.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
3. 3.⚖️ 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 change it (c) we measure it
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) a piece of string (c) a spoon (d) a shallow dish
5. 5.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) yeast (c) a piece of string (d) turmeric powder
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a spoon (c) a piece of string (d) warm water
7. 7.True or false: cooking an egg is a change that can be undone. (a) True (b) False
8. 8.⚖️ 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
9. 9.🧂 Which of these dissolves in water? (a) small pebbles (b) food colour (c) sand (d) cooking oil
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
11. 11.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
12. 12.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a spoon (d) a battery cell
13. 13.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) a spoon (d) a mirror
14. 14.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) yeast (c) a magnet (d) a shallow dish
15. 15.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) safe from small children (d) on the edge of a table
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
17. 17.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) small pebbles (d) sugar
18. 18.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
19. 19.⚖️ 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
20. 20.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) salt grows roots (d) water evaporates
21. 21.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) folding paper (d) rusting iron
22. 22.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) a balloon (d) a spoon
23. 23.⚖️ 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) days to see crystals (c) the same dish (d) the amount of salt
24. 24.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
25. 25.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
26. 26.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
27. 27.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) milk turning to curd (d) dissolving salt
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a spoon (c) a shallow dish (d) a piece of string
29. 29.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
30. 30.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
31. 31.⚖️ 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 kind of salt
32. 32.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
33. 33.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
34. 34.True or false: a shallow dish is needed for growing salt crystals. (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 kind of salt is what we measure. (a) False (b) True
36. 36.True or false: glucose powder dissolves in water. (a) True (b) False
37. 37.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to make it very salty (d) to change its colour
38. 38.True or false: food colour dissolves in water. (a) False (b) True
39. 39.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
40. 40.⚖️ 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 water

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