Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 679 · 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.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
2. 2.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) next to the baby (d) in a busy doorway
3. 3.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
4. 4.⚖️ 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
5. 5.True or false: rusting iron is a change that can be undone. (a) True (b) False
6. 6.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
7. 7.🔍 Which is the odd one out? (a) sand (b) baking soda (c) sawdust (d) chalk powder
8. 8.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
9. 9.🧂 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) table salt (d) sand
10. 10.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) bigger crystals (d) liquid crystals
11. 11.🔍 Which is the odd one out? (a) food colour (b) sugar (c) table salt (d) sand
12. 12.🧂 Which of these does not dissolve in water? (a) table salt (b) sand (c) food colour (d) glucose powder
13. 13.🧂 Which of these does not dissolve in water? (a) table salt (b) glucose powder (c) small pebbles (d) sugar
14. 14.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) saturated (d) magnetic
15. 15.⚖️ 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 same dish (b) the amount of water (c) days to see crystals (d) sunny or shady place
16. 16.🧈 Which of these is a change that can be undone? (a) melting ice (b) baking a cake (c) milk turning to curd (d) browning lemon ink
17. 17.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
18. 18.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
19. 19.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting butter (c) dissolving salt (d) milk turning to curd
20. 20.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
21. 21.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) turmeric powder (c) a battery cell (d) a magnet
22. 22.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) salt eats water (d) the dish melts
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a spoon (c) salt (d) warm water
24. 24.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
25. 25.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to make it very salty (d) to change its colour
26. 26.⚖️ 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) sunny or shady place (b) the same dish (c) days to see crystals (d) the amount of salt
27. 27.True or false: glucose powder dissolves in water. (a) False (b) True
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
29. 29.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
30. 30.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to oil (c) salt crystals form (d) it turns to butter
31. 31.True or false: warm water is needed for growing salt crystals. (a) False (b) True
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we keep it the same (b) we change it (c) we measure it
33. 33.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
34. 34.True or false: salt is not needed for growing salt crystals. (a) False (b) True
35. 35.⚖️ 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
36. 36.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) sea water evaporates (d) fish make it
37. 37.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
38. 38.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) sugar (d) chalk powder
40. 40.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny stars (d) tiny cubes

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