Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 829 · 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.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
2. 2.⚖️ 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 salt (c) sunny or shady place (d) the kind of salt
3. 3.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) dissolving salt (c) browning lemon ink (d) milk turning to curd
4. 4.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) a mirror (c) a balloon (d) a magnet
5. 5.True or false: baking soda does not dissolve in water. (a) True (b) False
6. 6.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) dissolving salt (d) milk turning to curd
7. 7.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a mirror (c) salt (d) a spoon
8. 8.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) sugar crystals form (d) it turns to oil
9. 9.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a magnet (c) warm water (d) a spoon
10. 10.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny cubes (d) tiny triangles
11. 11.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
12. 12.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
14. 14.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
15. 15.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
16. 16.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) melting butter (c) browning lemon ink (d) milk turning to curd
17. 17.⚖️ 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
18. 18.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it fizz (c) to make it very salty (d) to cool the water
19. 19.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
21. 21.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
22. 22.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) salt (d) a battery cell
23. 23.⚖️ 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
24. 24.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a battery cell (c) yeast (d) turmeric powder
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) yeast (d) warm water
26. 26.🧂 Which of these does not dissolve in water? (a) food colour (b) sugar (c) table salt (d) sawdust
27. 27.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) safe from small children (d) next to the baby
28. 28.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) dissolving salt (d) rusting iron
29. 29.🧂 Which of these dissolves in water? (a) cooking oil (b) glucose powder (c) sand (d) chalk powder
30. 30.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) warm water (c) turmeric powder (d) yeast
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we keep it the same (b) we change it (c) we measure it
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a piece of string (c) warm water (d) a shallow dish
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) turmeric powder (d) a spoon
34. 34.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
35. 35.True or false: sand dissolves in water. (a) True (b) False
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) days to see crystals (b) the same dish (c) sunny or shady place
37. 37.True or false: baking soda dissolves in water. (a) False (b) True
38. 38.🧂 Which of these does not dissolve in water? (a) baking soda (b) food colour (c) glucose powder (d) small pebbles
39. 39.⚖️ 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 change it (c) we keep it the same
40. 40.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) sand (d) glucose powder

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