Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 860 · 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.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a battery cell (c) a spoon (d) a shallow dish
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a shallow dish (d) a balloon
3. 3.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a magnet (c) yeast (d) a balloon
4. 4.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) rusting iron (c) browning lemon ink (d) baking a cake
5. 5.⚖️ 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 change it (b) we keep it the same (c) we measure it
6. 6.🧈 Which of these is a change that can be undone? (a) rusting iron (b) melting butter (c) browning lemon ink (d) cooking an egg
7. 7.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
8. 8.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
9. 9.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) cooking oil (d) glucose powder
10. 10.🔍 Which is the odd one out? (a) glucose powder (b) food colour (c) small pebbles (d) sugar
11. 11.⚖️ 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 amount of water (c) days to see crystals
12. 12.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
13. 13.⚖️ 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) True (b) False
14. 14.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of water (b) days to see crystals (c) sunny or shady place (d) the kind of salt
16. 16.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sand is ground up (d) sea water evaporates
17. 17.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
18. 18.🧂 Which of these does not dissolve in water? (a) sand (b) table salt (c) sugar (d) baking soda
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the same dish (b) sunny or shady place (c) days to see crystals
20. 20.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
22. 22.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) warm water (d) turmeric powder
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a battery cell (d) a spoon
25. 25.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
26. 26.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
27. 27.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
28. 28.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
30. 30.⚖️ 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 keep it the same (b) we change it (c) we measure it
31. 31.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) it fizzes (d) few or no crystals
32. 32.🔍 Which is the odd one out? (a) table salt (b) sawdust (c) chalk powder (d) cooking oil
33. 33.⚖️ 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) True (b) False
34. 34.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
35. 35.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a spoon (c) turmeric powder (d) a magnet
37. 37.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the amount of salt (b) sunny or shady place (c) days to see crystals (d) the same dish
39. 39.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) small pebbles (d) table salt
40. 40.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water

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