Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 329 · 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.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) the youngest child (d) nobody needs to
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we keep it the same (b) we measure it (c) we change it
3. 3.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) salt crystals form (d) it turns to oil
4. 4.True or false: rusting iron is a change that can be undone. (a) True (b) False
5. 5.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
6. 6.🔍 Which is the odd one out? (a) sawdust (b) sand (c) chalk powder (d) glucose powder
7. 7.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) yeast (c) a battery cell (d) a piece of string
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a balloon (c) a piece of string (d) a spoon
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) turmeric powder (d) a shallow dish
10. 10.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) days to see crystals (b) the amount of water (c) the amount of salt (d) sunny or shady place
12. 12.⚖️ 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 measure it (b) we keep it the same (c) we change it
13. 13.True or false: baking soda dissolves in water. (a) True (b) False
14. 14.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny cubes (d) tiny triangles
15. 15.True or false: salt is not needed for growing salt crystals. (a) True (b) False
16. 16.True or false: salt is needed for growing salt crystals. (a) False (b) True
17. 17.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
18. 18.True or false: sugar does not dissolve in water. (a) True (b) False
19. 19.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) a spoon (d) turmeric powder
20. 20.🧂 Which of these does not dissolve in water? (a) food colour (b) baking soda (c) cooking oil (d) glucose powder
21. 21.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
22. 22.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a shallow dish (c) yeast (d) turmeric powder
23. 23.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sand is ground up (c) sea water evaporates (d) salt rains down
24. 24.🔍 Which is the odd one out? (a) sawdust (b) chalk powder (c) baking soda (d) sand
25. 25.🧂 Which of these dissolves in water? (a) sugar (b) sand (c) sawdust (d) small pebbles
26. 26.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) next to the baby (d) on the edge of a table
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) salt (d) a magnet
28. 28.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a spoon (c) a battery cell (d) a mirror
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
31. 31.True or false: food colour dissolves in water. (a) False (b) True
32. 32.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) folding paper (c) milk turning to curd (d) freezing water
33. 33.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
34. 34.True or false: folding paper is a change that cannot be undone. (a) False (b) True
35. 35.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
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 same dish (b) sunny or shady place (c) the amount of salt (d) days to see crystals
37. 37.🧂 Which of these dissolves in water? (a) cooking oil (b) glucose powder (c) sand (d) chalk powder
38. 38.True or false: glucose powder does not dissolve in water. (a) True (b) False
39. 39.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
40. 40.🔍 Which is the odd one out? (a) glucose powder (b) sugar (c) sand (d) table salt

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