Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 816 · 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 mirror for growing salt crystals? (a) needed (b) not needed
2. 2.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
3. 3.True or false: table salt dissolves in water. (a) False (b) True
4. 4.⚖️ 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
5. 5.True or false: cooking oil does not dissolve in water. (a) False (b) True
6. 6.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) next to the baby (d) in a busy doorway
7. 7.⚖️ 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) False (b) True
8. 8.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
9. 9.⚖️ 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 kind of salt (b) the same dish (c) days to see crystals (d) sunny or shady place
10. 10.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) few or no crystals (d) it turns sweet
11. 11.🔍 Which is the odd one out? (a) glucose powder (b) cooking oil (c) small pebbles (d) sand
12. 12.True or false: salt is needed for growing salt crystals. (a) False (b) True
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a magnet (d) a piece of string
14. 14.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) baking a cake (d) melting ice
15. 15.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
16. 16.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) melting ice (c) folding paper (d) dissolving salt
17. 17.🧈 Which of these is a change that can be undone? (a) folding paper (b) milk turning to curd (c) baking a cake (d) cooking an egg
18. 18.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) the youngest child (d) nobody needs to
19. 19.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
20. 20.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny cubes (c) tiny triangles (d) tiny spheres
21. 21.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) no crystals (d) bigger crystals
22. 22.True or false: cooking oil dissolves in water. (a) False (b) True
23. 23.⚖️ 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 change it (b) we measure it (c) we keep it the same
24. 24.True or false: chalk powder dissolves in water. (a) False (b) True
25. 25.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) salt crystals form (d) it turns to oil
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a shallow dish (c) a piece of string (d) salt
27. 27.🧂 Which of these does not dissolve in water? (a) table salt (b) food colour (c) chalk powder (d) glucose powder
28. 28.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
29. 29.⚖️ 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 change it (b) we measure it (c) we keep it the same
30. 30.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) dissolving salt (c) freezing water (d) melting ice
31. 31.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
32. 32.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
33. 33.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
34. 34.🔍 Which is the odd one out? (a) chalk powder (b) sugar (c) cooking oil (d) sand
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 kept the same. (a) False (b) True
36. 36.True or false: sugar dissolves in water. (a) True (b) False
37. 37.⚖️ 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) sunny or shady place (c) the amount of water (d) the same dish
38. 38.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
39. 39.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
40. 40.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone

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