Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 15 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a balloon (d) a shallow dish
2. 2.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
3. 3.⚖️ 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) the same dish (b) days to see crystals (c) sunny or shady place (d) the amount of salt
4. 4.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) baking a cake (c) cooking an egg (d) browning lemon ink
5. 5.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
6. 6.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) nobody needs to (d) a friend who is running
7. 7.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
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 “days to see crystals”? (a) we measure it (b) we change it (c) we keep it the same
10. 10.True or false: melting ice is a change that can be undone. (a) True (b) False
11. 11.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
12. 12.True or false: warm water is needed for growing salt crystals. (a) False (b) True
13. 13.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it very salty (d) to make it fizz
14. 14.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
15. 15.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) yeast (c) a mirror (d) turmeric powder
16. 16.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
17. 17.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
18. 18.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) sawdust (d) sand
19. 19.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
20. 20.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
21. 21.🔍 Which is the odd one out? (a) chalk powder (b) cooking oil (c) sugar (d) sawdust
22. 22.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) sugar crystals form (d) it turns to oil
23. 23.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
24. 24.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
25. 25.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
26. 26.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
27. 27.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a piece of string (c) a magnet (d) yeast
28. 28.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a shallow dish (c) a magnet (d) yeast
29. 29.🔍 Which is the odd one out? (a) sawdust (b) small pebbles (c) table salt (d) sand
30. 30.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) turmeric powder (d) warm water
32. 32.⚖️ 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) True (b) False
33. 33.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) turmeric powder (c) a piece of string (d) salt
34. 34.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
35. 35.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) a piece of string (d) a magnet
36. 36.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) warm water (d) a balloon
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) False (b) True
39. 39.🧈 Which of these is a change that can be undone? (a) baking a cake (b) melting ice (c) cooking an egg (d) milk turning to curd
40. 40.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) melting ice (c) dissolving salt (d) folding paper

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