Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 713 · 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.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to change its colour (d) to cool the water
2. 2.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
3. 3.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) a spoon (d) a magnet
5. 5.True or false: chalk powder dissolves in water. (a) True (b) False
6. 6.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) browning lemon ink (d) melting butter
7. 7.⚖️ 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 measure it (c) we change it
8. 8.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a spoon (c) a mirror (d) a balloon
9. 9.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) sawdust (d) glucose powder
12. 12.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) table salt (d) cooking oil
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a battery cell (c) a piece of string (d) a shallow dish
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 kept the same. (a) False (b) True
15. 15.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) smaller crystals (d) liquid crystals
16. 16.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
17. 17.⚖️ 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 change it (b) we measure it (c) we keep it the same
18. 18.True or false: freezing water is a change that cannot be undone. (a) False (b) True
19. 19.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
20. 20.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) dissolving salt (d) milk turning to curd
21. 21.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) melting ice (d) baking a cake
22. 22.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) next to the baby (d) safe from small children
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
24. 24.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny spheres (d) tiny stars
25. 25.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a mirror (c) turmeric powder (d) yeast
26. 26.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
27. 27.🔍 Which is the odd one out? (a) small pebbles (b) table salt (c) sugar (d) baking soda
28. 28.True or false: melting butter is a change that cannot be undone. (a) True (b) False
29. 29.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
30. 30.🧂 Which of these dissolves in water? (a) small pebbles (b) sand (c) chalk powder (d) glucose powder
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) a balloon (d) a shallow dish
32. 32.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) it turns sweet (d) crystals grow faster
33. 33.🔍 Which is the odd one out? (a) small pebbles (b) sawdust (c) chalk powder (d) baking soda
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) False (b) True
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a mirror (c) salt (d) a piece of string
36. 36.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
37. 37.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) folding paper (c) melting butter (d) cooking an egg
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) yeast (c) salt (d) warm water
39. 39.⚖️ 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 kind of salt (b) days to see crystals (c) sunny or shady place (d) the amount of water
40. 40.🧂 Which of these does not dissolve in water? (a) table salt (b) glucose powder (c) sugar (d) small pebbles

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