Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 580 · 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? True or false: days to see crystals is what we measure. (a) False (b) True
2. 2.True or false: sand dissolves in water. (a) True (b) False
3. 3.True or false: baking soda does not dissolve in water. (a) True (b) False
4. 4.🔍 Which is the odd one out? (a) sand (b) glucose powder (c) baking soda (d) food colour
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a balloon (c) salt (d) a piece of string
6. 6.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a shallow dish (c) salt (d) warm water
8. 8.⚖️ 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) the amount of salt (c) days to see crystals (d) the kind of salt
9. 9.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a piece of string (c) salt (d) a shallow dish
12. 12.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a shallow dish (c) a balloon (d) yeast
13. 13.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
14. 14.🧂 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
15. 15.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
16. 16.⚖️ 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
17. 17.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) melting butter (c) dissolving salt (d) freezing water
18. 18.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) milk turning to curd (c) melting butter (d) dissolving salt
19. 19.⚖️ 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) sunny or shady place (b) the same dish (c) the kind of salt (d) the amount of salt
20. 20.🧂 Which of these dissolves in water? (a) chalk powder (b) small pebbles (c) cooking oil (d) table salt
21. 21.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
22. 22.🔍 Which is the odd one out? (a) small pebbles (b) glucose powder (c) sawdust (d) sand
23. 23.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
24. 24.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) next to the baby (d) on the edge of a table
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) True (b) False
26. 26.🔍 Which is the odd one out? (a) sawdust (b) table salt (c) baking soda (d) food colour
27. 27.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) fish make it (d) sand is ground up
28. 28.⚖️ 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 keep it the same (c) we measure it
29. 29.🧂 Which of these does not dissolve in water? (a) chalk powder (b) sugar (c) food colour (d) table salt
30. 30.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
31. 31.🛟 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
32. 32.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) baking a cake (d) melting ice
33. 33.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
34. 34.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny stars (d) tiny spheres
35. 35.True or false: sawdust dissolves in water. (a) True (b) False
36. 36.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) salt grows roots (d) the dish melts
37. 37.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
38. 38.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
39. 39.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
40. 40.🧂 Which of these dissolves in water? (a) cooking oil (b) small pebbles (c) chalk powder (d) glucose powder

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