Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 664 · 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.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
2. 2.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) magnetic (d) frozen
3. 3.⚖️ 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
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a magnet (c) a shallow dish (d) salt
5. 5.True or false: rusting iron is a change that can be undone. (a) True (b) False
6. 6.True or false: cooking oil dissolves in water. (a) True (b) False
7. 7.⚖️ 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 change it (b) we keep it the same (c) we measure it
8. 8.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
9. 9.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
10. 10.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
11. 11.🔍 Which is the odd one out? (a) baking soda (b) chalk powder (c) table salt (d) food colour
12. 12.🔍 Which is the odd one out? (a) food colour (b) chalk powder (c) sand (d) sawdust
13. 13.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to change its colour (d) to cool the water
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a shallow dish (d) yeast
15. 15.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) salt crystals form (c) it turns to butter (d) sugar crystals form
16. 16.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
17. 17.⚖️ 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
18. 18.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) melting butter (c) dissolving salt (d) folding paper
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False
20. 20.🛟 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
21. 21.⚖️ 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) the amount of salt (d) sunny or shady place
22. 22.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
23. 23.🔍 Which is the odd one out? (a) cooking oil (b) small pebbles (c) sawdust (d) sugar
24. 24.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) smaller crystals (d) liquid crystals
25. 25.⚖️ 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
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
27. 27.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
28. 28.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) a battery cell (d) a piece of string
30. 30.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) dissolving salt (c) rusting iron (d) cooking an egg
31. 31.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) warm water (c) a magnet (d) yeast
32. 32.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) the dish melts (c) salt grows roots (d) salt eats water
33. 33.🔍 Which is the odd one out? (a) chalk powder (b) cooking oil (c) table salt (d) sand
34. 34.🔍 Which is the odd one out? (a) glucose powder (b) food colour (c) baking soda (d) cooking oil
35. 35.⚖️ 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) False (b) True
36. 36.🧈 Which of these is a change that can be undone? (a) melting ice (b) baking a cake (c) rusting iron (d) cooking an egg
37. 37.True or false: table salt does not dissolve in water. (a) True (b) False
38. 38.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) sugar (d) small pebbles
39. 39.True or false: sawdust dissolves in water. (a) True (b) False
40. 40.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve

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