Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 684 · 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.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) liquid crystals (d) bigger crystals
2. 2.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
3. 3.🧂 Which of these dissolves in water? (a) chalk powder (b) baking soda (c) sand (d) small pebbles
4. 4.True or false: sawdust does not dissolve in water. (a) False (b) True
5. 5.True or false: cooking oil dissolves in water. (a) True (b) False
6. 6.⚖️ 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 kind of salt (b) the amount of water (c) the amount of salt (d) sunny or shady place
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) the youngest child (d) a grown-up
8. 8.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
9. 9.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
10. 10.🧈 Which of these is a change that can be undone? (a) freezing water (b) browning lemon ink (c) rusting iron (d) milk turning to curd
11. 11.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
12. 12.⚖️ 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) True (b) False
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) yeast (c) salt (d) a piece of string
14. 14.🔍 Which is the odd one out? (a) cooking oil (b) small pebbles (c) chalk powder (d) glucose powder
15. 15.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we change it (b) we keep it the same (c) we measure it
17. 17.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
18. 18.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny cubes (d) tiny spheres
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
20. 20.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a magnet (c) turmeric powder (d) a spoon
21. 21.🧂 Which of these dissolves in water? (a) cooking oil (b) food colour (c) sand (d) sawdust
22. 22.⚖️ 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 change it (b) we measure it (c) we keep it the same
23. 23.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) table salt (d) small pebbles
24. 24.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) it turns to butter (d) sugar crystals form
25. 25.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) a magnet (c) yeast (d) turmeric powder
27. 27.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) sawdust (d) sugar
28. 28.⚖️ 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 keep it the same (b) we measure it (c) we change it
29. 29.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
30. 30.True or false: folding paper is a change that can be undone. (a) False (b) True
31. 31.🔍 Which is the odd one out? (a) glucose powder (b) food colour (c) sugar (d) small pebbles
32. 32.🔍 Which is the odd one out? (a) sugar (b) chalk powder (c) food colour (d) baking soda
33. 33.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
34. 34.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) a balloon (d) salt
35. 35.🛟 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
36. 36.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
37. 37.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a piece of string (c) a spoon (d) salt
39. 39.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) warm water (d) a battery cell
40. 40.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water

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