Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 245 · 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.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a battery cell (c) salt (d) yeast
2. 2.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to make it fizz (d) to cool the water
3. 3.🧂 Which of these dissolves in water? (a) sugar (b) sawdust (c) cooking oil (d) chalk powder
4. 4.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) next to the baby (d) in a busy doorway
5. 5.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) folding paper (c) melting butter (d) rusting iron
6. 6.⚖️ 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 measure it (b) we keep it the same (c) we change it
7. 7.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
8. 8.⚖️ 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
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) turmeric powder (d) warm water
10. 10.⚖️ 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
11. 11.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
12. 12.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) liquid crystals (d) bigger crystals
13. 13.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
14. 14.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) browning lemon ink (c) melting ice (d) dissolving salt
15. 15.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) table salt (d) small pebbles
16. 16.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
17. 17.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
18. 18.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
19. 19.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny spheres (d) tiny cubes
20. 20.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) sand is ground up (c) fish make it (d) salt rains down
21. 21.True or false: melting ice is a change that cannot be undone. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) sawdust (b) cooking oil (c) sand (d) table salt
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) warm water (c) salt (d) a spoon
24. 24.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
25. 25.🧈 Which of these is a change that can be undone? (a) rusting iron (b) milk turning to curd (c) melting ice (d) cooking an egg
26. 26.⚖️ 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
27. 27.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
28. 28.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) it turns to oil (d) salt crystals form
29. 29.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
30. 30.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a balloon (c) a battery cell (d) a spoon
31. 31.⚖️ 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 keep it the same (c) we measure it
32. 32.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
33. 33.True or false: chalk powder dissolves in water. (a) False (b) True
34. 34.⚖️ 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 amount of salt (c) days to see crystals
35. 35.True or false: chalk powder does not dissolve in water. (a) True (b) False
36. 36.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a spoon (d) a battery cell
38. 38.🔍 Which is the odd one out? (a) table salt (b) sawdust (c) sugar (d) baking soda
39. 39.⚖️ 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 measure it (c) we keep it the same
40. 40.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed

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