Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 831 · 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) in a busy doorway (b) next to the baby (c) safe from small children (d) on the edge of a table
2. 2.⚖️ 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) sunny or shady place (c) days to see crystals (d) the same dish
3. 3.True or false: sawdust dissolves in water. (a) False (b) True
4. 4.⚖️ 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 change it (c) we measure it
5. 5.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
6. 6.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
7. 7.True or false: freezing water is a change that can be undone. (a) True (b) False
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a mirror (d) a shallow dish
9. 9.🔍 Which is the odd one out? (a) sugar (b) sand (c) glucose powder (d) baking soda
10. 10.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
11. 11.True or false: melting butter is a change that can be undone. (a) True (b) False
12. 12.True or false: baking a cake is a change that can be undone. (a) False (b) True
13. 13.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
14. 14.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
15. 15.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
16. 16.🛟 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
17. 17.🔍 Which is the odd one out? (a) food colour (b) cooking oil (c) chalk powder (d) sawdust
18. 18.🌊 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
19. 19.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) folding paper (d) rusting iron
20. 20.True or false: sand does not dissolve in water. (a) True (b) False
21. 21.True or false: folding paper is a change that can be undone. (a) False (b) True
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a spoon (c) warm water (d) salt
24. 24.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) glucose powder (d) sawdust
25. 25.⚖️ 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
26. 26.⚖️ 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
27. 27.⚖️ 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
28. 28.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
29. 29.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
30. 30.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) milk turning to curd (d) dissolving salt
31. 31.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a battery cell (c) salt (d) a shallow dish
32. 32.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
33. 33.🧂 Which of these dissolves in water? (a) cooking oil (b) sugar (c) chalk powder (d) sawdust
34. 34.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
35. 35.⚖️ 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 kind of salt
36. 36.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sawdust (c) baking soda (d) table salt
37. 37.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
38. 38.🧈 Which of these is a change that can be undone? (a) melting butter (b) baking a cake (c) rusting iron (d) milk turning to curd
39. 39.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny triangles (d) tiny cubes
40. 40.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to oil (d) it turns to butter

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