Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 832 · 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.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) empty (d) saturated
2. 2.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
3. 3.🔍 Which is the odd one out? (a) chalk powder (b) baking soda (c) sugar (d) food colour
4. 4.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
5. 5.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
6. 6.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
7. 7.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
8. 8.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a mirror (c) warm water (d) salt
10. 10.⚖️ 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 keep it the same (b) we change it (c) we measure it
11. 11.🔍 Which is the odd one out? (a) small pebbles (b) sugar (c) sand (d) cooking oil
12. 12.⚖️ 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
13. 13.🧂 Which of these does not dissolve in water? (a) sand (b) table salt (c) food colour (d) glucose powder
14. 14.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) dissolving salt (d) browning lemon ink
15. 15.🧈 Which of these is a change that can be undone? (a) melting ice (b) browning lemon ink (c) rusting iron (d) milk turning to curd
16. 16.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) food colour (d) cooking oil
17. 17.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to make it very salty (d) to cool the water
18. 18.🌊 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
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 kept the same. (a) True (b) False
20. 20.True or false: table salt does not dissolve in water. (a) False (b) True
21. 21.True or false: melting butter is a change that can be undone. (a) False (b) True
22. 22.⚖️ 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) False (b) True
23. 23.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a magnet (c) yeast (d) warm water
24. 24.True or false: folding paper is a change that cannot be undone. (a) True (b) False
25. 25.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a spoon (c) yeast (d) a battery cell
26. 26.⚖️ 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 kind of salt (b) sunny or shady place (c) days to see crystals (d) the amount of salt
27. 27.🔍 Which is the odd one out? (a) chalk powder (b) baking soda (c) cooking oil (d) small pebbles
28. 28.⚖️ 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
29. 29.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of salt (b) the same dish (c) the amount of water (d) days to see crystals
31. 31.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) a mirror (d) salt
33. 33.True or false: salt is not needed for growing salt crystals. (a) False (b) True
34. 34.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
35. 35.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) a shallow dish (d) yeast
36. 36.True or false: sawdust does not dissolve in water. (a) False (b) True
37. 37.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) folding paper (c) freezing water (d) milk turning to curd
38. 38.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
39. 39.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
40. 40.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) it turns to oil (d) salt crystals form

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