Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 373 · 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.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) frozen (c) empty (d) saturated
2. 2.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
3. 3.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a shallow dish (c) warm water (d) a piece of string
5. 5.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) safe from small children (d) next to the baby
6. 6.🧂 Which of these does not dissolve in water? (a) small pebbles (b) food colour (c) glucose powder (d) sugar
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) a friend who is running (d) nobody needs to
8. 8.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a mirror (c) a balloon (d) warm water
9. 9.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) water evaporates (d) the dish melts
10. 10.⚖️ 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
11. 11.⚖️ 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 change it (c) we measure it
12. 12.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) turmeric powder (d) salt
14. 14.⚖️ 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 measure it (b) we keep it the same (c) we change it
15. 15.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
16. 16.True or false: sand does not dissolve in water. (a) False (b) True
17. 17.⚖️ 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 kind of salt (b) the same dish (c) the amount of water (d) days to see crystals
18. 18.⚖️ 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
19. 19.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) sand is ground up (c) fish make it (d) salt rains down
20. 20.🔮 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
21. 21.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) sugar (d) sawdust
22. 22.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
23. 23.🧺 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 magnet (d) salt
24. 24.🧂 Which of these dissolves in water? (a) small pebbles (b) sawdust (c) sand (d) food colour
25. 25.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
26. 26.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
27. 27.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
28. 28.True or false: food colour does not dissolve in water. (a) False (b) True
29. 29.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
30. 30.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting butter (c) milk turning to curd (d) freezing water
31. 31.True or false: baking a cake is a change that can be undone. (a) False (b) True
32. 32.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a magnet (c) yeast (d) a spoon
33. 33.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
34. 34.True or false: table salt does not dissolve in water. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) sawdust (b) sand (c) chalk powder (d) glucose powder
36. 36.🧈 Which of these is a change that can be undone? (a) melting ice (b) milk turning to curd (c) browning lemon ink (d) cooking an egg
37. 37.🧂 Which of these dissolves in water? (a) sugar (b) small pebbles (c) sawdust (d) chalk powder
38. 38.🔍 Which is the odd one out? (a) baking soda (b) cooking oil (c) sugar (d) table salt
39. 39.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sugar (c) food colour (d) chalk powder
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a balloon (c) a piece of string (d) a shallow dish

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