Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 866 · 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.⚖️ 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 keep it the same (b) we measure it (c) we change it
2. 2.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) freezing water (c) baking a cake (d) browning lemon ink
3. 3.⚖️ 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
4. 4.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) a grown-up (d) nobody needs to
5. 5.True or false: melting ice is a change that can be undone. (a) True (b) False
6. 6.⚖️ 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
7. 7.⚖️ 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
8. 8.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to change its colour (d) to cool the water
9. 9.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny triangles (c) tiny stars (d) tiny spheres
10. 10.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
11. 11.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) the dish melts (d) water evaporates
12. 12.⚖️ 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 change it (b) we measure it (c) we keep it the same
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) False (b) True
14. 14.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
15. 15.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a balloon (d) a piece of string
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) a spoon (d) a balloon
18. 18.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) salt (c) a battery cell (d) yeast
19. 19.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
20. 20.True or false: sugar dissolves in water. (a) False (b) True
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a shallow dish (c) salt (d) a piece of string
22. 22.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) baking soda (d) sawdust
23. 23.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) glucose powder (d) cooking oil
24. 24.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
25. 25.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
26. 26.⚖️ 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 measure it (b) we change it (c) we keep it the same
27. 27.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
28. 28.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) a piece of string (d) a battery cell
30. 30.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
31. 31.⚖️ 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
32. 32.⚖️ 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 salt (b) days to see crystals (c) sunny or shady place
33. 33.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
34. 34.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
35. 35.⚖️ 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
36. 36.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
37. 37.True or false: salt is needed for growing salt crystals. (a) True (b) False
38. 38.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) melting ice (c) dissolving salt (d) melting butter
39. 39.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
40. 40.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) no crystals (d) smaller crystals

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