Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 392 · 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) chalk powder (c) glucose powder (d) table salt
2. 2.True or false: melting ice is a change that cannot be undone. (a) True (b) False
3. 3.True or false: salt is needed for growing salt crystals. (a) True (b) False
4. 4.True or false: cooking an egg is a change that can be undone. (a) True (b) False
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 kept the same. (a) True (b) False
6. 6.⚖️ 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
7. 7.⚖️ 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) False (b) True
8. 8.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) cooking oil (d) table salt
9. 9.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) it turns sweet (d) few or no crystals
10. 10.🧈 Which of these is a change that can be undone? (a) rusting iron (b) melting ice (c) browning lemon ink (d) baking a cake
11. 11.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
12. 12.⚖️ 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 change it (b) we keep it the same (c) we measure it
13. 13.🧈 Which of these is a change that can be undone? (a) rusting iron (b) freezing water (c) browning lemon ink (d) cooking an egg
14. 14.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) melting butter (d) browning lemon ink
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a magnet (d) warm water
16. 16.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a piece of string (c) a balloon (d) warm water
17. 17.True or false: cooking oil does not dissolve in water. (a) True (b) False
18. 18.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a friend who is running (d) a grown-up
19. 19.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) sand (d) food colour
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) True (b) False
21. 21.True or false: melting butter is a change that cannot be undone. (a) True (b) False
22. 22.🧂 Which of these dissolves in water? (a) baking soda (b) chalk powder (c) sawdust (d) cooking oil
23. 23.⚖️ 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
24. 24.🔍 Which is the odd one out? (a) sawdust (b) glucose powder (c) sugar (d) food colour
25. 25.True or false: melting butter is a change that can be undone. (a) True (b) False
26. 26.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) bigger crystals (d) liquid crystals
27. 27.⚖️ 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 change it (c) we keep it the same
28. 28.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
29. 29.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
30. 30.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) food colour (d) chalk powder
31. 31.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) the dish melts (d) salt grows roots
32. 32.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a magnet (c) a balloon (d) a piece of string
33. 33.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
34. 34.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) sugar crystals form (d) it turns to butter
35. 35.True or false: melting ice is a change that can be undone. (a) False (b) True
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.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny cubes (c) tiny triangles (d) tiny spheres
38. 38.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) small pebbles (b) cooking oil (c) sand (d) sugar
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a balloon (c) salt (d) a shallow dish

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