Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 266 · 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.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
2. 2.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
3. 3.⚖️ 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) sunny or shady place (b) the kind of salt (c) the same dish (d) days to see crystals
4. 4.True or false: folding paper is a change that cannot be undone. (a) False (b) True
5. 5.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
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 salt”? (a) we change it (b) we keep it the same (c) we measure it
7. 7.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) dissolving salt (d) browning lemon ink
8. 8.⚖️ 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 change it (b) we measure it (c) we keep it the same
9. 9.True or false: melting ice is a change that can be undone. (a) False (b) True
10. 10.🧂 Which of these does not dissolve in water? (a) baking soda (b) cooking oil (c) table salt (d) glucose powder
11. 11.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) empty (d) magnetic
12. 12.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
13. 13.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) salt rains down (c) fish make it (d) sand is ground up
14. 14.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) yeast (c) salt (d) a spoon
16. 16.🔍 Which is the odd one out? (a) small pebbles (b) sugar (c) chalk powder (d) cooking oil
17. 17.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
18. 18.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
19. 19.🔍 Which is the odd one out? (a) chalk powder (b) cooking oil (c) sand (d) baking soda
20. 20.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
21. 21.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to make it very salty (d) to change its colour
22. 22.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a piece of string (c) a balloon (d) a mirror
23. 23.True or false: freezing water is a change that can be undone. (a) False (b) True
24. 24.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) turmeric powder (b) a spoon (c) warm water (d) salt
26. 26.⚖️ 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) True (b) False
27. 27.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) rusting iron (c) freezing water (d) baking a cake
28. 28.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) salt (c) a balloon (d) turmeric powder
29. 29.⚖️ 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
30. 30.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a battery cell (c) warm water (d) yeast
31. 31.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
32. 32.True or false: sand dissolves in water. (a) False (b) True
33. 33.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) it turns to oil (d) salt crystals form
34. 34.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
35. 35.🛟 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
36. 36.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) cooking oil (d) sugar
37. 37.True or false: sand does not dissolve in water. (a) True (b) False
38. 38.🧂 Which of these dissolves in water? (a) food colour (b) small pebbles (c) chalk powder (d) sawdust
39. 39.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
40. 40.⚖️ 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 keep it the same (b) we measure it (c) we change it

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