Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 697 · 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: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) sugar crystals form (d) it turns to butter
2. 2.True or false: melting butter is a change that can be undone. (a) False (b) True
3. 3.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) no crystals (d) bigger crystals
4. 4.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
5. 5.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
6. 6.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
7. 7.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) on the edge of a table (d) safe from small children
8. 8.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) sawdust (d) sugar
9. 9.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
10. 10.True or false: baking soda dissolves in water. (a) False (b) True
11. 11.⚖️ 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 amount of water (c) sunny or shady place
12. 12.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) few or no crystals (d) it fizzes
13. 13.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
14. 14.True or false: melting ice is a change that cannot be undone. (a) False (b) True
15. 15.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) dissolving salt (c) milk turning to curd (d) cooking an egg
16. 16.⚖️ 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
17. 17.🧂 Which of these does not dissolve in water? (a) table salt (b) food colour (c) small pebbles (d) sugar
18. 18.True or false: freezing water is a change that can be undone. (a) False (b) True
19. 19.True or false: sugar dissolves in water. (a) True (b) False
20. 20.⚖️ 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 amount of salt (b) days to see crystals (c) the amount of water (d) sunny or shady place
21. 21.⚖️ 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 measure it (b) we change it (c) we keep it the same
22. 22.⚖️ 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 measure it (b) we change it (c) we keep it the same
23. 23.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
24. 24.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) baking soda (d) sugar
25. 25.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) a piece of string (d) yeast
27. 27.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
28. 28.⚖️ 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
29. 29.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
30. 30.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
31. 31.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
32. 32.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
33. 33.⚖️ 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
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) True (b) False
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a magnet (c) salt (d) a spoon
36. 36.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a balloon (c) warm water (d) a magnet
37. 37.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
38. 38.🔍 Which is the odd one out? (a) small pebbles (b) food colour (c) baking soda (d) glucose powder
39. 39.⚖️ 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 change it (b) we measure it (c) we keep it the same
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False

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