Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 667 · 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.True or false: salt is needed for growing salt crystals. (a) True (b) False
2. 2.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it fizzes (d) it turns sweet
3. 3.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) browning lemon ink (d) melting butter
4. 4.🛟 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
5. 5.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
6. 6.🧂 Which of these does not dissolve in water? (a) food colour (b) baking soda (c) sand (d) glucose powder
7. 7.🔍 Which is the odd one out? (a) food colour (b) cooking oil (c) baking soda (d) sugar
8. 8.True or false: salt is not needed for growing salt crystals. (a) True (b) False
9. 9.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) next to the baby (d) in a busy doorway
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a shallow dish (c) warm water (d) a piece of string
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) a piece of string (c) warm water (d) a spoon
12. 12.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) salt crystals form (c) it turns to butter (d) sugar crystals form
13. 13.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) freezing water (c) milk turning to curd (d) browning lemon ink
14. 14.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
15. 15.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
16. 16.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
17. 17.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a balloon (c) warm water (d) a mirror
18. 18.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
19. 19.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a balloon (c) a mirror (d) yeast
20. 20.⚖️ 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) days to see crystals (c) sunny or shady place
21. 21.True or false: sugar does not dissolve in water. (a) True (b) False
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) a battery cell (d) a shallow dish
24. 24.True or false: freezing water is a change that can be undone. (a) False (b) True
25. 25.⚖️ 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) the amount of salt (c) sunny or shady place (d) the amount of water
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) False (b) True
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we change it (b) we keep it the same (c) we measure it
28. 28.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) bigger crystals (d) smaller crystals
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a spoon (c) salt (d) warm water
30. 30.⚖️ 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
31. 31.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sugar (c) baking soda (d) sawdust
32. 32.🧂 Which of these dissolves in water? (a) table salt (b) small pebbles (c) chalk powder (d) sand
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a magnet (d) warm water
34. 34.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
35. 35.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting butter (c) freezing water (d) baking a cake
36. 36.True or false: sawdust dissolves in water. (a) False (b) True
37. 37.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny spheres (d) tiny triangles
38. 38.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it fizz (c) to make it very salty (d) to change its colour
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.🔍 Which is the odd one out? (a) cooking oil (b) chalk powder (c) sand (d) table salt

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