Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 746 · 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 of these does not dissolve in water? (a) food colour (b) sugar (c) chalk powder (d) glucose powder
2. 2.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
3. 3.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
4. 4.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
5. 5.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) folding paper (c) cooking an egg (d) freezing water
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) salt (d) a battery cell
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we change it (b) we measure it (c) we keep it the same
8. 8.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to make it fizz (d) to cool the water
9. 9.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
11. 11.🔍 Which is the odd one out? (a) sawdust (b) cooking oil (c) food colour (d) small pebbles
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
13. 13.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
14. 14.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
15. 15.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
16. 16.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny stars (d) tiny cubes
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) False (b) True
18. 18.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
19. 19.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) the dish melts (d) water evaporates
20. 20.🧂 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) table salt (d) small pebbles
21. 21.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) baking a cake (c) melting ice (d) dissolving salt
22. 22.⚖️ 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) False (b) True
23. 23.⚖️ 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
24. 24.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
25. 25.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
26. 26.True or false: cooking an egg is a change that can be undone. (a) True (b) False
27. 27.🧂 Which of these dissolves in water? (a) chalk powder (b) baking soda (c) cooking oil (d) sand
28. 28.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
29. 29.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
30. 30.True or false: sugar does not dissolve in water. (a) False (b) True
31. 31.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
32. 32.⚖️ 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 keep it the same (b) we measure it (c) we change it
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) False (b) True
34. 34.⚖️ 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) sunny or shady place (c) days to see crystals
35. 35.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
36. 36.🔍 Which is the odd one out? (a) cooking oil (b) sawdust (c) small pebbles (d) table salt
37. 37.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) sunny or shady place (c) the same dish (d) the amount of water
39. 39.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) sand is ground up (c) salt rains down (d) fish make it
40. 40.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve

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