Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 311 · 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.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
2. 2.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
3. 3.⚖️ 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) the amount of water (c) days to see crystals
4. 4.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) freezing water (d) baking a cake
5. 5.⚖️ 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
6. 6.⚖️ 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
7. 7.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
8. 8.True or false: glucose powder dissolves in water. (a) True (b) False
9. 9.⚖️ 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) days to see crystals (b) the amount of water (c) sunny or shady place (d) the amount of salt
10. 10.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
11. 11.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to butter (d) it turns to oil
12. 12.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False
14. 14.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a battery cell (c) salt (d) a spoon
16. 16.🧈 Which of these is a change that can be undone? (a) melting butter (b) cooking an egg (c) baking a cake (d) milk turning to curd
17. 17.🧺 Which of these is needed for growing salt crystals? (a) salt (b) turmeric powder (c) a battery cell (d) a balloon
18. 18.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
19. 19.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) safe from small children (d) on the edge of a table
20. 20.True or false: folding paper is a change that can be undone. (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) glucose powder (d) small pebbles
22. 22.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
23. 23.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) melting butter (d) milk turning to curd
24. 24.True or false: sugar dissolves in water. (a) False (b) True
25. 25.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) empty (c) saturated (d) magnetic
26. 26.True or false: sawdust does not dissolve in water. (a) False (b) True
27. 27.True or false: melting butter is a change that cannot be undone. (a) True (b) False
28. 28.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) nobody needs to (d) a friend who is running
29. 29.🔍 Which is the odd one out? (a) table salt (b) food colour (c) chalk powder (d) sugar
30. 30.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
31. 31.True or false: food colour dissolves in water. (a) False (b) True
32. 32.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) dissolving salt (c) browning lemon ink (d) rusting iron
33. 33.⚖️ 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
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) sunny or shady place (b) the amount of salt (c) days to see crystals
35. 35.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) yeast (c) a magnet (d) a piece of string
36. 36.⚖️ 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
37. 37.True or false: glucose powder does not dissolve in water. (a) False (b) True
38. 38.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny cubes (c) tiny stars (d) tiny triangles
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) True (b) False
40. 40.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a spoon (c) yeast (d) a magnet

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