Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 428 · 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: rusting iron? (a) can be undone (b) cannot be undone
2. 2.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
3. 3.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
4. 4.🧂 Which of these does not dissolve in water? (a) sugar (b) table salt (c) chalk powder (d) glucose powder
5. 5.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) the dish melts (d) water evaporates
6. 6.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) cooking oil (d) table salt
7. 7.⚖️ 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
8. 8.🔍 Which is the odd one out? (a) food colour (b) cooking oil (c) sugar (d) table salt
9. 9.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
10. 10.⚖️ 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
11. 11.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) cooking oil (d) baking soda
12. 12.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sea water evaporates (c) sand is ground up (d) salt rains down
13. 13.⚖️ 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 same dish (c) the amount of salt (d) days to see crystals
14. 14.True or false: melting ice is a change that cannot be undone. (a) False (b) True
15. 15.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) sugar (d) chalk powder
16. 16.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
17. 17.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) a spoon (d) yeast
19. 19.🔍 Which is the odd one out? (a) cooking oil (b) table salt (c) sand (d) chalk powder
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
21. 21.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
22. 22.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
23. 23.⚖️ 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) sunny or shady place (c) the same dish
24. 24.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
25. 25.True or false: salt is not needed for growing salt crystals. (a) True (b) False
26. 26.⚖️ 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) False (b) True
27. 27.True or false: chalk powder does not dissolve in water. (a) True (b) False
28. 28.🛟 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
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) True (b) False
30. 30.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
31. 31.⚖️ 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 keep it the same (b) we measure it (c) we change it
32. 32.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) folding paper (c) baking a cake (d) milk turning to curd
33. 33.True or false: melting ice is a change that can be undone. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) chalk powder (b) glucose powder (c) table salt (d) food colour
35. 35.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) a piece of string (d) turmeric powder
36. 36.⚖️ 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 measure it (b) we keep it the same (c) we change it
37. 37.🧂 Which of these does not dissolve in water? (a) table salt (b) cooking oil (c) baking soda (d) sugar
38. 38.🧈 Which of these is a change that can be undone? (a) melting butter (b) cooking an egg (c) baking a cake (d) milk turning to curd
39. 39.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) browning lemon ink (d) melting ice
40. 40.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) sugar crystals form (d) salt crystals form

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