Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 447 · 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.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
2. 2.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
3. 3.🔍 Which is the odd one out? (a) baking soda (b) table salt (c) glucose powder (d) small pebbles
4. 4.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) turmeric powder (c) a piece of string (d) a mirror
5. 5.⚖️ 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
6. 6.⚖️ 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
7. 7.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
8. 8.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a battery cell (c) a balloon (d) salt
9. 9.⚖️ 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 change it (b) we keep it the same (c) we measure it
10. 10.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
11. 11.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
12. 12.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
13. 13.True or false: small pebbles dissolves in water. (a) True (b) False
14. 14.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
15. 15.True or false: sawdust does not dissolve in water. (a) True (b) False
16. 16.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
17. 17.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) rusting iron (d) dissolving salt
18. 18.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
19. 19.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) yeast (d) a shallow dish
21. 21.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it fizz (c) to change its colour (d) to make it very salty
22. 22.🧂 Which of these does not dissolve in water? (a) small pebbles (b) table salt (c) sugar (d) baking soda
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 mirror (d) salt
24. 24.🧈 Which of these is a change that can be undone? (a) baking a cake (b) browning lemon ink (c) melting ice (d) cooking an egg
25. 25.⚖️ 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 amount of salt (c) the amount of water (d) the kind of salt
26. 26.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) cooking oil (d) sand
27. 27.True or false: sugar does not dissolve in water. (a) True (b) False
28. 28.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) freezing water (c) folding paper (d) melting ice
30. 30.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) baking a cake (c) rusting iron (d) cooking an egg
31. 31.True or false: salt is needed for growing salt crystals. (a) False (b) True
32. 32.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny cubes (d) tiny spheres
33. 33.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
34. 34.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
35. 35.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
36. 36.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
37. 37.⚖️ 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
38. 38.True or false: glucose powder does not dissolve in water. (a) True (b) False
39. 39.⚖️ 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) sunny or shady place (c) the amount of water (d) days to see crystals
40. 40.🧂 Which of these dissolves in water? (a) small pebbles (b) sand (c) sawdust (d) sugar

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