Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 764 · 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) a magnet (b) a shallow dish (c) a spoon (d) a piece of string
2. 2.True or false: sand dissolves in water. (a) True (b) False
3. 3.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a piece of string (d) a mirror
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) True (b) False
6. 6.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny cubes (d) tiny triangles
7. 7.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
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) days to see crystals (b) the same dish (c) sunny or shady place
9. 9.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.⚖️ 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 keep it the same (b) we measure it (c) we change it
11. 11.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
12. 12.🔍 Which is the odd one out? (a) sugar (b) sawdust (c) baking soda (d) glucose powder
13. 13.⚖️ 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
14. 14.True or false: melting ice is a change that can be undone. (a) True (b) False
15. 15.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) folding paper (c) freezing water (d) dissolving salt
16. 16.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) sugar (d) baking soda
17. 17.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
18. 18.🔍 Which is the odd one out? (a) chalk powder (b) cooking oil (c) food colour (d) small pebbles
19. 19.⚖️ 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 keep it the same (c) we change it
20. 20.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) magnetic (d) frozen
21. 21.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
22. 22.⚖️ 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) False (b) True
23. 23.True or false: rusting iron is a change that can be undone. (a) False (b) True
24. 24.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a shallow dish (d) a battery cell
26. 26.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a balloon (c) warm water (d) turmeric powder
27. 27.True or false: melting butter is a change that can be undone. (a) False (b) True
28. 28.⚖️ 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
29. 29.⚖️ 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 change it (c) we keep it the same
30. 30.⚖️ 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
31. 31.True or false: freezing water is a change that cannot be undone. (a) False (b) True
32. 32.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
33. 33.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to oil (c) salt crystals form (d) it turns to butter
34. 34.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
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 kept the same. (a) True (b) False
36. 36.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) next to the baby (d) in a busy doorway
37. 37.🔍 Which is the odd one out? (a) food colour (b) sugar (c) cooking oil (d) baking soda
38. 38.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
39. 39.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it turns sweet (d) it fizzes
40. 40.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) cooking an egg (c) folding paper (d) melting ice

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