Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 698 · 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 is the odd one out? (a) glucose powder (b) baking soda (c) table salt (d) sand
2. 2.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) cooking oil (d) baking soda
3. 3.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
4. 4.🔍 Which is the odd one out? (a) cooking oil (b) chalk powder (c) small pebbles (d) glucose powder
5. 5.⚖️ 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 keep it the same (b) we change it (c) we measure it
6. 6.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
7. 7.🧂 Which of these does not dissolve in water? (a) small pebbles (b) baking soda (c) table salt (d) food colour
8. 8.⚖️ 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
9. 9.⚖️ 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
10. 10.⚖️ 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
11. 11.⚖️ 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) the same dish (d) the amount of salt
12. 12.🧂 Which of these does not dissolve in water? (a) sand (b) table salt (c) sugar (d) glucose powder
13. 13.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) next to the baby (d) on the edge of a table
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a shallow dish (c) a spoon (d) salt
15. 15.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a battery cell (c) a balloon (d) warm water
16. 16.⚖️ 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 kind of salt (c) days to see crystals
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
18. 18.True or false: small pebbles does not dissolve in water. (a) False (b) True
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) turmeric powder (c) a shallow dish (d) salt
20. 20.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a balloon (d) warm water
22. 22.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
23. 23.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
24. 24.⚖️ 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
25. 25.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
26. 26.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
27. 27.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
28. 28.True or false: food colour dissolves in water. (a) False (b) True
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) a balloon (d) salt
30. 30.🧈 Which of these is a change that can be undone? (a) melting butter (b) baking a cake (c) browning lemon ink (d) rusting iron
31. 31.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
32. 32.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny triangles (d) tiny stars
33. 33.🧂 Which of these does not dissolve in water? (a) chalk powder (b) food colour (c) glucose powder (d) baking soda
34. 34.True or false: melting ice is a change that cannot be undone. (a) True (b) False
35. 35.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it very salty (c) to make it fizz (d) to change its colour
37. 37.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
38. 38.True or false: salt is not needed for growing salt crystals. (a) False (b) True
39. 39.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) nobody needs to (d) the youngest child
40. 40.⚖️ 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 kind of salt (b) days to see crystals (c) the amount of salt (d) sunny or shady place

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