Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 497 · 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.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
2. 2.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sand is ground up (d) sea water evaporates
3. 3.⚖️ 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 kind of salt (b) days to see crystals (c) sunny or shady place (d) the amount of salt
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) a magnet (d) salt
5. 5.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) a grown-up (d) the youngest child
6. 6.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny spheres (c) tiny stars (d) tiny cubes
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a battery cell (d) a spoon
8. 8.🔍 Which is the odd one out? (a) table salt (b) food colour (c) small pebbles (d) baking soda
9. 9.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) safe from small children (d) in a busy doorway
10. 10.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
11. 11.True or false: melting butter is a change that cannot be undone. (a) True (b) False
12. 12.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
13. 13.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) it turns to butter (d) sugar crystals form
14. 14.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
15. 15.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) melting ice (c) freezing water (d) folding paper
16. 16.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a balloon (c) salt (d) yeast
17. 17.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a balloon (c) turmeric powder (d) a mirror
18. 18.⚖️ 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 amount of salt (c) sunny or shady place
19. 19.🧂 Which of these dissolves in water? (a) baking soda (b) sawdust (c) sand (d) small pebbles
20. 20.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
21. 21.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
22. 22.⚖️ 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 keep it the same (b) we measure it (c) we change it
23. 23.⚖️ 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 keep it the same (b) we change it (c) we measure it
24. 24.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
25. 25.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
27. 27.True or false: sand does not dissolve in water. (a) False (b) True
28. 28.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) sand (d) food colour
29. 29.🔍 Which is the odd one out? (a) sawdust (b) baking soda (c) small pebbles (d) sand
30. 30.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
31. 31.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) baking a cake (d) dissolving salt
32. 32.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
33. 33.⚖️ 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) False (b) True
34. 34.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it very salty (c) to make it fizz (d) to change its colour
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
36. 36.🧈 Which of these is a change that can be undone? (a) melting butter (b) browning lemon ink (c) rusting iron (d) milk turning to curd
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the amount of water (c) the amount of salt (d) sunny or shady place
38. 38.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
39. 39.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) a spoon (c) salt (d) a piece of string
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) warm water (c) a piece of string (d) salt

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