Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 297 · 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.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny spheres (d) tiny cubes
2. 2.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) sawdust (d) glucose powder
3. 3.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
4. 4.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
5. 5.🔍 Which is the odd one out? (a) chalk powder (b) glucose powder (c) cooking oil (d) small pebbles
6. 6.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
7. 7.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) folding paper (c) melting butter (d) freezing water
8. 8.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
9. 9.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) next to the baby (d) in a busy doorway
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 measure it (b) we keep it the same (c) we change it
11. 11.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
12. 12.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) smaller crystals (d) liquid crystals
13. 13.🔮 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
14. 14.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a magnet (c) salt (d) warm water
15. 15.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
16. 16.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
17. 17.⚖️ 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 kind of salt (b) days to see crystals (c) the same dish (d) the amount of water
18. 18.⚖️ 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
19. 19.⚖️ 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) the amount of salt (b) the same dish (c) the kind of salt (d) sunny or shady place
20. 20.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to make it very salty (c) to cool the water (d) to change its colour
21. 21.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
22. 22.True or false: melting butter is a change that can be undone. (a) True (b) False
23. 23.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) rusting iron (d) freezing water
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) True (b) False
25. 25.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a battery cell (d) a piece of string
27. 27.True or false: milk turning to curd 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 amount of salt”? (a) we keep it the same (b) we measure it (c) we change it
29. 29.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
30. 30.True or false: freezing water 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 “the kind of salt”? (a) we keep it the same (b) we measure it (c) we change it
32. 32.True or false: food colour does not dissolve in water. (a) True (b) False
33. 33.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) sugar crystals form (d) it turns to oil
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) the kind of salt (b) sunny or shady place (c) days to see crystals
35. 35.⚖️ 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
36. 36.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
37. 37.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
38. 38.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) yeast (d) a shallow dish
39. 39.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
40. 40.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed

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