Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 555 · 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.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) milk turning to curd (d) melting butter
2. 2.True or false: glucose powder does not dissolve in water. (a) True (b) False
3. 3.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
4. 4.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a mirror (c) a balloon (d) a spoon
5. 5.True or false: cooking an egg is a change that can be undone. (a) True (b) False
6. 6.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to make it very salty (c) to cool the water (d) to change its colour
7. 7.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt grows roots (d) salt eats water
8. 8.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
9. 9.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) on the edge of a table (d) next to the baby
10. 10.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a mirror (d) a shallow dish
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) True (b) False
12. 12.True or false: freezing water is a change that can be undone. (a) True (b) False
13. 13.True or false: warm water is needed for growing salt crystals. (a) True (b) False
14. 14.🧂 Which of these dissolves in water? (a) glucose powder (b) chalk powder (c) small pebbles (d) sand
15. 15.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) baking a cake (c) dissolving salt (d) melting butter
16. 16.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
17. 17.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
18. 18.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) baking soda (d) chalk powder
19. 19.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) it turns to oil (d) salt crystals form
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a spoon (d) turmeric powder
21. 21.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a magnet (d) a spoon
23. 23.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
24. 24.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a mirror (d) a shallow dish
26. 26.🧂 Which of these does not dissolve in water? (a) glucose powder (b) table salt (c) sugar (d) sawdust
27. 27.🔍 Which is the odd one out? (a) sawdust (b) cooking oil (c) glucose powder (d) sand
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a battery cell (c) salt (d) a piece of string
29. 29.⚖️ 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 keep it the same (b) we change it (c) we measure it
30. 30.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
31. 31.⚖️ 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) the kind of salt (c) the amount of salt (d) days to see crystals
32. 32.⚖️ 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 keep it the same (c) we measure it
33. 33.True or false: cooking oil dissolves in water. (a) True (b) False
34. 34.True or false: table salt does not dissolve in water. (a) False (b) True
35. 35.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) fish make it (d) sand is ground up
36. 36.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting ice (c) browning lemon ink (d) freezing water
37. 37.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.🔍 Which is the odd one out? (a) sugar (b) food colour (c) sawdust (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 kind of salt”? (a) we measure it (b) we keep it the same (c) we change it
40. 40.🔍 Which is the odd one out? (a) chalk powder (b) sugar (c) food colour (d) baking soda

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