Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 944 · 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.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the amount of salt (c) the amount of water (d) days to see crystals
2. 2.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
3. 3.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) melting butter (d) rusting iron
4. 4.True or false: salt is not needed for growing salt crystals. (a) False (b) True
5. 5.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
6. 6.True or false: folding paper is a change that cannot be undone. (a) True (b) False
7. 7.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a battery cell (c) a piece of string (d) a balloon
8. 8.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) chalk powder (d) food colour
9. 9.⚖️ 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 change it (b) we keep it the same (c) we measure it
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 water”? (a) we keep it the same (b) we measure it (c) we change it
11. 11.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
12. 12.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
13. 13.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) magnetic (d) saturated
14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
15. 15.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
16. 16.⚖️ 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 amount of salt (b) the kind of salt (c) sunny or shady place (d) days to see crystals
17. 17.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
18. 18.True or false: sand dissolves in water. (a) False (b) True
19. 19.True or false: baking soda dissolves in water. (a) False (b) True
20. 20.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) yeast (c) turmeric powder (d) a shallow dish
21. 21.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) melting ice (c) melting butter (d) dissolving salt
22. 22.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) glucose powder (d) small pebbles
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) True (b) False
24. 24.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
25. 25.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
26. 26.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) fish make it (c) sand is ground up (d) salt rains down
27. 27.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny spheres (d) tiny cubes
28. 28.🧺 Which of these is needed for growing salt crystals? (a) salt (b) yeast (c) a magnet (d) a balloon
29. 29.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
30. 30.⚖️ 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
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a magnet (d) a piece of string
32. 32.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) salt (d) yeast
34. 34.🧂 Which of these does not dissolve in water? (a) cooking oil (b) food colour (c) sugar (d) baking soda
35. 35.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to butter (d) it turns to oil
36. 36.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it fizz (c) to cool the water (d) to make it very salty
37. 37.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
38. 38.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
39. 39.True or false: table salt does not dissolve in water. (a) True (b) False
40. 40.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed

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