Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 195 · 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) on the edge of a table (b) safe from small children (c) next to the baby (d) in a busy doorway
2. 2.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
3. 3.🧂 Which of these dissolves in water? (a) chalk powder (b) cooking oil (c) small pebbles (d) food colour
4. 4.True or false: salt is needed for growing salt crystals. (a) True (b) False
5. 5.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
6. 6.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
8. 8.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
9. 9.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny spheres (d) tiny cubes
11. 11.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
12. 12.True or false: folding paper is a change that can be undone. (a) False (b) True
13. 13.⚖️ 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 change it (b) we measure it (c) we keep it the same
14. 14.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
15. 15.⚖️ 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 kind of salt (b) sunny or shady place (c) days to see crystals
16. 16.⚖️ 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 measure it (b) we change it (c) we keep it the same
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a spoon (d) a battery cell
18. 18.🧂 Which of these dissolves in water? (a) cooking oil (b) glucose powder (c) small pebbles (d) sawdust
19. 19.🧂 Which of these does not dissolve in water? (a) glucose powder (b) baking soda (c) table salt (d) sand
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a balloon (d) salt
21. 21.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
22. 22.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
23. 23.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) yeast (d) a spoon
25. 25.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) milk turning to curd (c) melting ice (d) melting butter
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a shallow dish (c) a spoon (d) salt
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) warm water (c) a shallow dish (d) salt
28. 28.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) table salt (d) sawdust
29. 29.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) fish make it (d) sea water evaporates
30. 30.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) sugar (d) small pebbles
31. 31.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) sawdust (d) baking soda
32. 32.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) warm water (c) turmeric powder (d) a battery cell
33. 33.True or false: baking soda dissolves in water. (a) True (b) False
34. 34.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
35. 35.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) salt eats water (d) the dish melts
36. 36.⚖️ 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 same dish (c) days to see crystals (d) sunny or shady place
37. 37.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the amount of water
39. 39.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
40. 40.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a battery cell (c) a balloon (d) salt

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