Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 854 · 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.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
2. 2.⚖️ 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 keep it the same (c) we measure it
3. 3.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to butter (d) it turns to oil
4. 4.⚖️ 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
5. 5.⚖️ 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
6. 6.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) folding paper (c) milk turning to curd (d) dissolving salt
7. 7.⚖️ 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 kind of salt (c) the amount of water (d) the amount of salt
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the amount of salt (b) sunny or shady place (c) days to see crystals
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) sunny or shady place (b) the kind of salt (c) the amount of water (d) days to see crystals
10. 10.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) the youngest child (d) a grown-up
11. 11.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
12. 12.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) it turns sweet (d) few or no crystals
13. 13.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it fizz (d) to make it very salty
14. 14.True or false: melting ice is a change that can be undone. (a) True (b) False
15. 15.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
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 measure it (b) we keep it the same (c) we change it
17. 17.🧂 Which of these does not dissolve in water? (a) glucose powder (b) baking soda (c) sand (d) sugar
18. 18.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a magnet (c) a mirror (d) a balloon
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a mirror (c) a spoon (d) a shallow dish
20. 20.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a spoon (c) turmeric powder (d) a magnet
21. 21.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a spoon (c) a piece of string (d) a shallow dish
23. 23.⚖️ 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 same dish
24. 24.⚖️ 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
25. 25.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
26. 26.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
27. 27.🔍 Which is the odd one out? (a) glucose powder (b) cooking oil (c) baking soda (d) sugar
28. 28.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a mirror (d) a spoon
29. 29.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) no crystals (d) bigger crystals
30. 30.True or false: salt is needed for growing salt crystals. (a) True (b) False
31. 31.⚖️ 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
32. 32.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) warm water (c) salt (d) a piece of string
34. 34.True or false: glucose powder does not dissolve in water. (a) True (b) False
35. 35.⚖️ 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 measure it (c) we change it
36. 36.🔍 Which is the odd one out? (a) cooking oil (b) food colour (c) small pebbles (d) sand
37. 37.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
38. 38.⚖️ 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) False (b) True
39. 39.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
40. 40.🧂 Which of these dissolves in water? (a) baking soda (b) small pebbles (c) sawdust (d) chalk powder

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