Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 427 · 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 dissolves in water? (a) chalk powder (b) sawdust (c) sand (d) sugar
2. 2.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) crystals grow faster (d) few or no crystals
3. 3.⚖️ 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) days to see crystals (c) sunny or shady place
4. 4.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
5. 5.⚖️ 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 measure it (b) we change it (c) we keep it the same
6. 6.⚖️ 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 change it (c) we measure it
7. 7.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
8. 8.True or false: melting butter is a change that cannot be undone. (a) True (b) False
9. 9.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
10. 10.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
11. 11.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the amount of water
13. 13.🧂 Which of these does not dissolve in water? (a) baking soda (b) chalk powder (c) food colour (d) table salt
14. 14.True or false: cooking an egg is a change that can be undone. (a) True (b) False
15. 15.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
16. 16.True or false: cooking oil dissolves in water. (a) False (b) True
17. 17.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
18. 18.True or false: sugar dissolves in water. (a) False (b) True
19. 19.True or false: table salt does not dissolve in water. (a) True (b) False
20. 20.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) cooking an egg (d) melting butter
21. 21.⚖️ 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) the amount of salt (c) sunny or shady place (d) the kind of salt
22. 22.True or false: folding paper is a change that cannot be undone. (a) True (b) False
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a spoon (c) a balloon (d) a shallow dish
24. 24.⚖️ 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
25. 25.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) turmeric powder (d) a piece of string
27. 27.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny spheres (c) tiny cubes (d) tiny stars
28. 28.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
29. 29.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a balloon (c) yeast (d) a mirror
30. 30.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
31. 31.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
32. 32.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) cooking oil (d) food colour
33. 33.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
34. 34.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
35. 35.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sand is ground up (d) sea water evaporates
36. 36.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a mirror (c) a piece of string (d) a spoon
38. 38.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) safe from small children (d) on the edge of a table
39. 39.True or false: small pebbles dissolves in water. (a) True (b) False
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) warm water (d) a balloon

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