Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 469 · 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.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) a piece of string (d) a battery cell
4. 4.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
5. 5.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
6. 6.True or false: food colour does not dissolve in water. (a) True (b) False
7. 7.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
8. 8.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
9. 9.🧂 Which of these does not dissolve in water? (a) cooking oil (b) food colour (c) glucose powder (d) baking soda
10. 10.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) baking a cake (d) dissolving salt
11. 11.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) freezing water (c) melting butter (d) melting ice
12. 12.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) turmeric powder (c) a magnet (d) warm water
13. 13.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) milk turning to curd (c) dissolving salt (d) melting butter
14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) True (b) False
15. 15.🧂 Which of these dissolves in water? (a) small pebbles (b) sand (c) baking soda (d) sawdust
16. 16.True or false: food colour dissolves in water. (a) True (b) False
17. 17.⚖️ 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
18. 18.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
19. 19.⚖️ 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
20. 20.⚖️ 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) True (b) False
21. 21.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to oil (c) it turns to butter (d) salt crystals form
22. 22.True or false: yeast is needed for growing salt crystals. (a) True (b) False
23. 23.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
24. 24.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a spoon (c) a piece of string (d) a battery cell
25. 25.True or false: small pebbles dissolves in water. (a) True (b) False
26. 26.🧂 Which of these does not dissolve in water? (a) small pebbles (b) table salt (c) sugar (d) glucose powder
27. 27.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
28. 28.⚖️ 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) the same dish (c) sunny or shady place
29. 29.True or false: table salt does not dissolve in water. (a) False (b) True
30. 30.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
31. 31.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny spheres (d) tiny cubes
32. 32.⚖️ 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) sunny or shady place (b) the kind of salt (c) the amount of salt (d) days to see crystals
33. 33.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) turmeric powder (c) salt (d) a magnet
34. 34.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
35. 35.🔍 Which is the odd one out? (a) food colour (b) sand (c) cooking oil (d) sawdust
36. 36.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) glucose powder (d) small pebbles
38. 38.True or false: melting ice is a change that can be undone. (a) False (b) True
39. 39.True or false: dissolving salt is a change that can be undone. (a) False (b) True
40. 40.True or false: rusting iron is a change that can be undone. (a) True (b) False

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