Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 39 · 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) a spoon (b) salt (c) a shallow dish (d) a mirror
2. 2.⚖️ 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 water (b) sunny or shady place (c) the kind of salt (d) days to see crystals
3. 3.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
4. 4.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
5. 5.⚖️ 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) sunny or shady place (c) the same dish (d) the amount of salt
6. 6.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) cooking oil (b) sugar (c) sand (d) chalk powder
8. 8.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) salt rains down (c) sand is ground up (d) fish make it
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a piece of string (c) warm water (d) a shallow dish
10. 10.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
11. 11.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
12. 12.True or false: yeast is needed for growing salt crystals. (a) False (b) True
13. 13.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
14. 14.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) milk turning to curd (d) folding paper
15. 15.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) browning lemon ink (c) melting butter (d) freezing water
16. 16.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) it turns sweet (d) crystals grow faster
17. 17.🧂 Which of these dissolves in water? (a) sawdust (b) cooking oil (c) chalk powder (d) sugar
18. 18.⚖️ 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 salt (c) sunny or shady place
19. 19.🔍 Which is the odd one out? (a) cooking oil (b) baking soda (c) chalk powder (d) small pebbles
20. 20.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
21. 21.⚖️ 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
22. 22.⚖️ 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 change it (b) we measure it (c) we keep it the same
23. 23.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
24. 24.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to make it very salty (d) to cool the water
25. 25.True or false: glucose powder dissolves in water. (a) True (b) False
26. 26.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
27. 27.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
28. 28.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
29. 29.⚖️ 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 change it (b) we measure it (c) we keep it the same
30. 30.🧂 Which of these dissolves in water? (a) table salt (b) chalk powder (c) sand (d) small pebbles
31. 31.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) a balloon (d) warm water
32. 32.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
33. 33.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
34. 34.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) freezing water (c) rusting iron (d) baking a cake
35. 35.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) water evaporates (d) the dish melts
36. 36.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) sugar (b) food colour (c) glucose powder (d) cooking oil
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a shallow dish (d) a battery cell
39. 39.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) salt (d) a magnet
40. 40.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water

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