Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 823 · 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.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
2. 2.True or false: glucose powder does not dissolve in water. (a) False (b) True
3. 3.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) baking a cake (c) dissolving salt (d) melting ice
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a piece of string (d) a balloon
5. 5.⚖️ 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 keep it the same (c) we measure it
6. 6.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) a spoon (d) a magnet
7. 7.⚖️ 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
8. 8.⚖️ 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 kind of salt (d) sunny or shady place
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) warm water (c) salt (d) a shallow dish
10. 10.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
11. 11.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
12. 12.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
13. 13.True or false: a magnet is not needed for growing salt crystals. (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 “the kind of salt”? (a) we change it (b) we measure it (c) we keep it the same
15. 15.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
16. 16.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) water evaporates (d) the dish melts
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a shallow dish (d) yeast
18. 18.⚖️ 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
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) True (b) False
20. 20.🔮 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
21. 21.🔍 Which is the odd one out? (a) sand (b) glucose powder (c) chalk powder (d) sawdust
22. 22.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a battery cell (c) turmeric powder (d) a spoon
23. 23.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a battery cell (c) a magnet (d) a balloon
24. 24.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
25. 25.True or false: sugar dissolves in water. (a) False (b) True
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 what we measure. (a) False (b) True
27. 27.⚖️ 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) True (b) False
28. 28.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
29. 29.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
30. 30.True or false: baking soda does not dissolve in water. (a) False (b) True
31. 31.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to change its colour (c) to make it fizz (d) to cool the water
32. 32.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
33. 33.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) it fizzes (d) crystals grow faster
34. 34.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
35. 35.🧈 Which of these is a change that can be undone? (a) melting butter (b) milk turning to curd (c) browning lemon ink (d) baking a cake
36. 36.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) food colour (d) sawdust
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) warm water (c) a shallow dish (d) salt
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a mirror (d) salt
39. 39.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a shallow dish (c) a piece of string (d) salt

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