Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 596 · 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: the amount of water is kept the same. (a) True (b) False
2. 2.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
3. 3.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) milk turning to curd (d) dissolving salt
4. 4.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
5. 5.🔍 Which is the odd one out? (a) food colour (b) sand (c) sawdust (d) cooking oil
6. 6.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
7. 7.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
8. 8.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
9. 9.⚖️ 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
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) turmeric powder (c) salt (d) warm water
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) warm water (d) a battery cell
12. 12.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
13. 13.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) yeast (c) a shallow dish (d) a balloon
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a piece of string (d) a mirror
15. 15.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
16. 16.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to oil (d) it turns to butter
17. 17.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
18. 18.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) rusting iron (c) browning lemon ink (d) freezing water
19. 19.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) yeast (c) a piece of string (d) warm water
21. 21.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
22. 22.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) warm water (d) a magnet
24. 24.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) a friend who is running (d) nobody needs to
25. 25.True or false: sawdust does not dissolve in water. (a) True (b) False
26. 26.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
27. 27.True or false: folding paper is a change that can be undone. (a) False (b) True
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the same dish (c) days to see crystals (d) the amount of water
29. 29.True or false: warm water is needed for growing salt crystals. (a) False (b) True
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) warm water (c) salt (d) a shallow dish
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
32. 32.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny triangles (d) tiny spheres
33. 33.⚖️ 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 same dish
34. 34.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
35. 35.🧈 Which of these is a change that can be undone? (a) baking a cake (b) browning lemon ink (c) milk turning to curd (d) melting butter
36. 36.True or false: melting butter is a change that cannot be undone. (a) False (b) True
37. 37.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
38. 38.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
39. 39.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a shallow dish (c) a magnet (d) a piece of string

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