Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 506 · 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.🛟 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
2. 2.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
3. 3.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to make it very salty (d) to cool the water
4. 4.⚖️ 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 amount of water (b) sunny or shady place (c) days to see crystals
5. 5.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) bigger crystals (d) no crystals
6. 6.⚖️ 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
7. 7.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
8. 8.🔍 Which is the odd one out? (a) baking soda (b) cooking oil (c) glucose powder (d) table salt
9. 9.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
10. 10.⚖️ 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 keep it the same (b) we measure it (c) we change it
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) turmeric powder (d) salt
12. 12.⚖️ 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) the same dish (c) sunny or shady place (d) the amount of water
13. 13.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it turns sweet (d) it fizzes
14. 14.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny cubes (d) tiny triangles
15. 15.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) a shallow dish (c) salt (d) a piece of string
16. 16.True or false: sugar does not dissolve in water. (a) False (b) True
17. 17.⚖️ 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) True (b) False
18. 18.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
19. 19.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
20. 20.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
21. 21.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
23. 23.True or false: baking a cake is a change that can be undone. (a) False (b) True
24. 24.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) small pebbles (d) baking soda
25. 25.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
26. 26.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
27. 27.🔍 Which is the odd one out? (a) sawdust (b) table salt (c) glucose powder (d) baking soda
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) True (b) False
29. 29.True or false: salt is not needed for growing salt crystals. (a) True (b) False
30. 30.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
31. 31.🧂 Which of these does not dissolve in water? (a) glucose powder (b) baking soda (c) table salt (d) sawdust
32. 32.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
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 what we measure. (a) True (b) False
34. 34.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) sugar (d) cooking oil
35. 35.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) freezing water (c) melting ice (d) melting butter
36. 36.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
37. 37.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
38. 38.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a magnet (c) a mirror (d) a battery cell
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
40. 40.True or false: warm water is not needed for growing salt crystals. (a) True (b) False

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