Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 440 · 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) cannot be undone (b) can be undone
2. 2.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
3. 3.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
4. 4.True or false: sugar does not dissolve in water. (a) True (b) False
5. 5.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a mirror (c) a magnet (d) a spoon
6. 6.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) the youngest child (d) a grown-up
8. 8.⚖️ 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) True (b) False
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.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) few or no crystals (d) crystals grow faster
11. 11.True or false: freezing water is a change that can be undone. (a) True (b) False
12. 12.⚖️ 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
13. 13.⚖️ 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 water (b) the same dish (c) sunny or shady place (d) days to see crystals
14. 14.True or false: salt is needed for growing salt crystals. (a) False (b) True
15. 15.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
16. 16.🌊 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
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a magnet (c) a spoon (d) warm water
18. 18.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to change its colour (d) to make it very salty
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a shallow dish (c) a piece of string (d) salt
20. 20.⚖️ 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) False (b) True
21. 21.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny triangles (d) tiny stars
22. 22.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt grows roots (d) salt eats water
23. 23.⚖️ 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 water (b) the same dish (c) sunny or shady place (d) days to see crystals
24. 24.True or false: baking soda does not dissolve in water. (a) False (b) True
25. 25.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) no crystals (d) bigger crystals
26. 26.⚖️ 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 change it (b) we measure it (c) we keep it the same
27. 27.⚖️ 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
28. 28.True or false: rusting iron is a change that can be undone. (a) True (b) False
29. 29.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
30. 30.True or false: folding paper is a change that can be undone. (a) False (b) True
31. 31.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) freezing water (c) milk turning to curd (d) folding paper
32. 32.⚖️ 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) False (b) True
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the same dish (c) days to see crystals
34. 34.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
35. 35.⚖️ 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) False (b) True
36. 36.⚖️ 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 change it (c) we measure it
37. 37.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
38. 38.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
39. 39.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) dissolving salt (d) baking a cake
40. 40.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve

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