Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 544 · 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.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) a battery cell (d) salt
2. 2.🧂 Which of these dissolves in water? (a) small pebbles (b) sand (c) cooking oil (d) baking soda
3. 3.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
4. 4.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) frozen (d) magnetic
5. 5.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) True (b) False
7. 7.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
8. 8.⚖️ 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 water
9. 9.⚖️ 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 amount of water (b) sunny or shady place (c) days to see crystals (d) the amount of salt
10. 10.⚖️ 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
11. 11.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) cooking an egg (d) melting ice
12. 12.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
13. 13.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
14. 14.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a piece of string (d) a balloon
16. 16.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
17. 17.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
18. 18.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
19. 19.⚖️ 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 change it (b) we measure it (c) we keep it the same
20. 20.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) it turns to oil (d) salt crystals form
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) salt (d) a mirror
22. 22.🧂 Which of these dissolves in water? (a) small pebbles (b) sand (c) sugar (d) chalk powder
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) a mirror (d) salt
24. 24.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) yeast (c) salt (d) a spoon
25. 25.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
26. 26.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to make it very salty (d) to cool the water
27. 27.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) a battery cell (d) salt
28. 28.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.⚖️ 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 measure it (c) we change it
30. 30.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) salt eats water (d) water evaporates
31. 31.True or false: glucose powder does not dissolve in water. (a) False (b) True
32. 32.True or false: salt is needed for growing salt crystals. (a) False (b) True
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a battery cell (d) a spoon
34. 34.🧂 Which of these dissolves in water? (a) glucose powder (b) sawdust (c) small pebbles (d) sand
35. 35.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
36. 36.⚖️ 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
37. 37.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) sugar (d) sawdust
38. 38.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) food colour (d) sawdust
39. 39.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
40. 40.⚖️ 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) True (b) False

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