Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 436 · 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 is the odd one out? (a) baking soda (b) table salt (c) chalk powder (d) glucose powder
2. 2.⚖️ 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) True (b) False
3. 3.⚖️ 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
4. 4.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) salt crystals form (d) sugar crystals form
5. 5.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
6. 6.🧂 Which of these does not dissolve in water? (a) baking soda (b) sugar (c) sawdust (d) glucose powder
7. 7.🧂 Does sawdust 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? What do we do with “the amount of salt”? (a) we measure it (b) we keep it the same (c) we change it
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.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) frozen (d) magnetic
11. 11.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) salt grows roots (d) water evaporates
12. 12.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
13. 13.🧂 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
14. 14.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) crystals grow faster (d) few or no crystals
15. 15.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) baking soda (d) sawdust
16. 16.⚖️ 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 measure it (c) we change it
17. 17.⚖️ 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) sunny or shady place (c) the amount of salt
18. 18.🔍 Which is the odd one out? (a) sand (b) cooking oil (c) glucose powder (d) chalk powder
19. 19.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) cooking oil (d) glucose powder
20. 20.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a spoon (c) a piece of string (d) yeast
21. 21.🔍 Which is the odd one out? (a) table salt (b) sugar (c) sand (d) glucose powder
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
23. 23.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
24. 24.⚖️ 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
25. 25.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
26. 26.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
27. 27.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) yeast (c) warm water (d) turmeric powder
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
29. 29.⚖️ 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
30. 30.True or false: melting butter is a change that cannot be undone. (a) False (b) True
31. 31.⚖️ 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 measure it (b) we keep it the same (c) we change it
32. 32.⚖️ 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 change it (b) we measure it (c) we keep it the same
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
34. 34.⚖️ 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 amount of water (c) sunny or shady place
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
37. 37.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) bigger crystals (d) smaller crystals
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a mirror (d) a shallow dish
39. 39.⚖️ 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
40. 40.True or false: freezing water is a change that can be undone. (a) True (b) False

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