Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 962 · 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.🧺 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) yeast
2. 2.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to change its colour (c) to cool the water (d) to make it fizz
3. 3.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) a grown-up (d) the youngest child
4. 4.True or false: melting butter is a change that can be undone. (a) False (b) True
5. 5.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
6. 6.⚖️ 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 change it (b) we keep it the same (c) we measure it
7. 7.True or false: dissolving salt is a change that can be undone. (a) True (b) False
8. 8.⚖️ 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
9. 9.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) folding paper (d) baking a cake
10. 10.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) rusting iron (d) dissolving salt
11. 11.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) warm water (c) a shallow dish (d) a piece of string
13. 13.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
14. 14.True or false: yeast is needed for growing salt crystals. (a) True (b) False
15. 15.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
16. 16.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) freezing water (c) dissolving salt (d) melting ice
17. 17.🔍 Which is the odd one out? (a) sand (b) sugar (c) baking soda (d) table salt
18. 18.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
19. 19.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny cubes (d) tiny stars
20. 20.⚖️ 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 change it (c) we measure it
21. 21.True or false: table salt does not dissolve in water. (a) True (b) False
22. 22.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) sea water evaporates (d) fish make it
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) days to see crystals (b) sunny or shady place (c) the same dish
24. 24.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
25. 25.🧂 Which of these does not dissolve in water? (a) baking soda (b) sand (c) table salt (d) sugar
26. 26.⚖️ 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 change it (c) we keep it the same
27. 27.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
28. 28.True or false: warm water is needed for growing salt crystals. (a) True (b) False
29. 29.⚖️ 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) False (b) True
30. 30.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) rusting iron (c) melting ice (d) browning lemon ink
31. 31.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
32. 32.⚖️ 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 same dish (b) the amount of salt (c) sunny or shady place (d) days to see crystals
33. 33.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
34. 34.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
35. 35.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
36. 36.🔮 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
37. 37.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) crystals grow faster (d) it turns sweet
38. 38.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) cooking oil (d) food colour
39. 39.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) frozen (d) magnetic
40. 40.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water

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