Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 219 · 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.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to cool the water (c) to make it fizz (d) to change its colour
2. 2.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) salt crystals form (d) it turns to butter
3. 3.🔍 Which is the odd one out? (a) sugar (b) sand (c) sawdust (d) small pebbles
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a piece of string (c) a balloon (d) salt
5. 5.True or false: cooking oil does not dissolve in water. (a) True (b) False
6. 6.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a piece of string (d) a balloon
8. 8.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sugar (c) chalk powder (d) food colour
9. 9.🛟 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
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) turmeric powder (c) a shallow dish (d) a spoon
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) warm water (d) a battery cell
12. 12.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
13. 13.True or false: table salt does not dissolve in water. (a) True (b) False
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 change it (b) we measure it (c) we keep it the same
15. 15.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny cubes (d) tiny triangles
16. 16.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) food colour (d) sand
17. 17.⚖️ 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 change it (b) we keep it the same (c) we measure it
18. 18.⚖️ 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 amount of salt (c) sunny or shady place (d) days to see crystals
19. 19.🔍 Which is the odd one out? (a) baking soda (b) sand (c) chalk powder (d) cooking oil
20. 20.⚖️ 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
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
22. 22.⚖️ 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) days to see crystals (b) sunny or shady place (c) the same dish (d) the amount of water
23. 23.🔮 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
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a shallow dish (d) a magnet
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) a piece of string (c) a shallow dish (d) warm water
26. 26.🔍 Which is the odd one out? (a) cooking oil (b) sugar (c) table salt (d) glucose powder
27. 27.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) folding paper (c) melting ice (d) melting butter
28. 28.True or false: melting ice is a change that can be undone. (a) True (b) False
29. 29.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
30. 30.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
31. 31.True or false: sand dissolves in water. (a) False (b) True
32. 32.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
33. 33.⚖️ 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 keep it the same (c) we change it
34. 34.True or false: sawdust does not dissolve in water. (a) True (b) False
35. 35.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) a shallow dish (d) turmeric powder
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the amount of water
37. 37.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
38. 38.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
39. 39.True or false: folding paper is a change that cannot be undone. (a) True (b) False
40. 40.True or false: glucose powder does not dissolve in water. (a) True (b) False

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