Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 225 · 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.🛟 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
3. 3.🔍 Which is the odd one out? (a) small pebbles (b) sugar (c) cooking oil (d) sawdust
4. 4.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a battery cell (c) a balloon (d) warm water
5. 5.⚖️ 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 keep it the same (c) we change it
6. 6.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
7. 7.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a magnet (c) turmeric powder (d) a piece of string
8. 8.🧂 Which of these does not dissolve in water? (a) glucose powder (b) baking soda (c) sawdust (d) table salt
9. 9.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
10. 10.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
11. 11.🔍 Which is the odd one out? (a) table salt (b) cooking oil (c) sand (d) small pebbles
12. 12.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
13. 13.True or false: sawdust dissolves in water. (a) True (b) False
14. 14.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
15. 15.⚖️ 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
16. 16.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) sawdust (d) sugar
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) turmeric powder (d) a shallow dish
18. 18.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
19. 19.🧂 Which of these dissolves in water? (a) glucose powder (b) sand (c) small pebbles (d) cooking oil
20. 20.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) sand (b) baking soda (c) food colour (d) sugar
22. 22.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) no crystals (d) bigger crystals
23. 23.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
24. 24.🔍 Which is the odd one out? (a) small pebbles (b) table salt (c) food colour (d) baking soda
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a battery cell (d) a spoon
26. 26.🔍 Which is the odd one out? (a) food colour (b) cooking oil (c) small pebbles (d) sawdust
27. 27.⚖️ 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 kind of salt (d) sunny or shady place
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) a magnet (d) salt
29. 29.⚖️ 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) days to see crystals (b) the amount of salt (c) sunny or shady place (d) the same dish
30. 30.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a battery cell (c) a spoon (d) a magnet
31. 31.🧂 Which of these does not dissolve in water? (a) glucose powder (b) table salt (c) food colour (d) chalk powder
32. 32.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
33. 33.🧈 Which of these is a change that can be undone? (a) baking a cake (b) melting ice (c) browning lemon ink (d) rusting iron
34. 34.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
35. 35.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sea water evaporates (d) sand is ground up
36. 36.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) baking a cake (d) dissolving salt
37. 37.⚖️ 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
38. 38.True or false: cooking oil does not dissolve in water. (a) False (b) True
39. 39.🧂 Which of these does not dissolve in water? (a) food colour (b) baking soda (c) glucose powder (d) sand
40. 40.🧈 Which of these is a change that can be undone? (a) freezing water (b) cooking an egg (c) milk turning to curd (d) rusting iron

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