Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 499 · 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.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
2. 2.🔍 Which is the odd one out? (a) sugar (b) sawdust (c) table salt (d) baking soda
3. 3.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) rusting iron (c) folding paper (d) melting butter
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a piece of string (d) yeast
5. 5.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it fizz (d) to make it very salty
6. 6.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) freezing water (c) baking a cake (d) rusting iron
7. 7.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
8. 8.⚖️ 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 same dish (b) the amount of water (c) the amount of salt (d) sunny or shady place
9. 9.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
10. 10.⚖️ 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 change it (c) we measure it
11. 11.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) safe from small children (d) on the edge of a table
12. 12.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
13. 13.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) folding paper (c) dissolving salt (d) cooking an egg
14. 14.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
15. 15.⚖️ 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) True (b) False
16. 16.⚖️ 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 keep it the same (b) we measure it (c) we change it
17. 17.⚖️ 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) False (b) True
18. 18.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
19. 19.🧂 Which of these does not dissolve in water? (a) glucose powder (b) table salt (c) small pebbles (d) sugar
20. 20.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a battery cell (c) a magnet (d) turmeric powder
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the kind of salt (c) the amount of water (d) sunny or shady place
22. 22.🛟 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
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) turmeric powder (d) warm water
24. 24.🔍 Which is the odd one out? (a) baking soda (b) table salt (c) food colour (d) chalk powder
25. 25.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) crystals grow faster (d) few or no crystals
26. 26.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) salt crystals form (d) it turns to oil
27. 27.🔍 Which is the odd one out? (a) sugar (b) cooking oil (c) table salt (d) baking soda
28. 28.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) a shallow dish (c) salt (d) a spoon
29. 29.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
30. 30.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) sand is ground up (d) fish make it
31. 31.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
32. 32.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a battery cell (c) warm water (d) a spoon
35. 35.True or false: melting butter is a change that can be undone. (a) True (b) False
36. 36.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
37. 37.⚖️ 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 measure it (b) we keep it the same (c) we change it
38. 38.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a shallow dish (c) a piece of string (d) a balloon
39. 39.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) sand (d) sugar
40. 40.🔍 Which is the odd one out? (a) sawdust (b) chalk powder (c) sand (d) baking soda

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