Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 920 · 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.⚖️ 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) the same dish (b) the kind of salt (c) the amount of salt (d) sunny or shady place
2. 2.⚖️ 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
3. 3.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to oil (d) it turns to butter
4. 4.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sand is ground up (d) sea water evaporates
5. 5.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) frozen (d) saturated
6. 6.🧂 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) table salt (d) cooking oil
7. 7.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a balloon (c) a piece of string (d) a spoon
8. 8.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) milk turning to curd (c) cooking an egg (d) rusting iron
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the amount of water (b) days to see crystals (c) sunny or shady place
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 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? True or false: days to see crystals is the one thing we change. (a) False (b) True
12. 12.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) no crystals (d) liquid crystals
13. 13.⚖️ 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 same dish (c) sunny or shady place
14. 14.True or false: warm water is needed for growing salt crystals. (a) True (b) False
15. 15.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
16. 16.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) water evaporates (d) the dish melts
17. 17.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
18. 18.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) dissolving salt (c) browning lemon ink (d) melting ice
19. 19.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
20. 20.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) a battery cell (d) salt
21. 21.⚖️ 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
22. 22.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
23. 23.🔍 Which is the odd one out? (a) sugar (b) small pebbles (c) glucose powder (d) table salt
24. 24.True or false: sugar dissolves in water. (a) True (b) False
25. 25.🧈 Which of these is a change that can be undone? (a) baking a cake (b) melting ice (c) browning lemon ink (d) cooking an egg
26. 26.⚖️ 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
27. 27.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a battery cell (c) a balloon (d) turmeric powder
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a mirror (d) a piece of string
29. 29.True or false: salt is needed for growing salt crystals. (a) False (b) True
30. 30.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
31. 31.True or false: small pebbles dissolves in water. (a) False (b) True
32. 32.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
33. 33.🔍 Which is the odd one out? (a) chalk powder (b) sugar (c) baking soda (d) table salt
34. 34.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
35. 35.True or false: folding paper is a change that cannot be undone. (a) True (b) False
36. 36.⚖️ 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
37. 37.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a battery cell (c) warm water (d) a balloon
38. 38.🔍 Which is the odd one out? (a) cooking oil (b) food colour (c) sand (d) sawdust
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a balloon (d) a spoon
40. 40.🧂 Which of these does not dissolve in water? (a) table salt (b) food colour (c) baking soda (d) sand

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