Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 503 · 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.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
2. 2.🔍 Which is the odd one out? (a) small pebbles (b) sugar (c) sawdust (d) sand
3. 3.⚖️ 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 change it (b) we keep it the same (c) we measure it
4. 4.⚖️ 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 water (b) the same dish (c) the amount of salt (d) sunny or shady place
5. 5.True or false: food colour does not dissolve in water. (a) False (b) True
6. 6.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) melting ice (d) milk turning to curd
7. 7.🧂 Which of these does not dissolve in water? (a) sugar (b) cooking oil (c) table salt (d) glucose powder
8. 8.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) it turns to oil (d) salt crystals form
9. 9.⚖️ 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) True (b) False
10. 10.True or false: sand dissolves in water. (a) True (b) False
11. 11.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a battery cell (c) salt (d) a magnet
12. 12.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) cooking an egg (c) dissolving salt (d) melting butter
13. 13.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
14. 14.⚖️ 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 amount of salt (c) sunny or shady place (d) the kind of salt
15. 15.🛟 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
16. 16.🧺 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 battery cell
17. 17.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
18. 18.🔍 Which is the odd one out? (a) sawdust (b) table salt (c) glucose powder (d) sugar
19. 19.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) smaller crystals (d) no crystals
20. 20.🔍 Which is the odd one out? (a) sand (b) cooking oil (c) small pebbles (d) glucose powder
21. 21.True or false: melting butter is a change that cannot be undone. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) sand (b) sawdust (c) cooking oil (d) baking soda
23. 23.🔍 Which is the odd one out? (a) baking soda (b) sand (c) table salt (d) food colour
24. 24.🔍 Which is the odd one out? (a) sand (b) table salt (c) cooking oil (d) small pebbles
25. 25.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) food colour (d) cooking oil
26. 26.⚖️ 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 measure it (b) we change it (c) we keep it the same
27. 27.⚖️ 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 keep it the same (b) we measure it (c) we change it
28. 28.True or false: small pebbles dissolves in water. (a) False (b) True
29. 29.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
30. 30.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
31. 31.🧂 Which of these does not dissolve in water? (a) baking soda (b) chalk powder (c) table salt (d) sugar
32. 32.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
33. 33.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) warm water (c) a magnet (d) a balloon
34. 34.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) melting butter (c) folding paper (d) dissolving salt
35. 35.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) few or no crystals (d) crystals grow faster
36. 36.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
37. 37.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
38. 38.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) in a busy doorway (d) on the edge of a table
39. 39.⚖️ 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 change it (c) we keep it the same
40. 40.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water

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