Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 84 · 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.True or false: freezing water is a change that cannot be undone. (a) True (b) False
2. 2.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a balloon (c) a spoon (d) yeast
3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) the amount of salt (c) sunny or shady place
4. 4.⚖️ 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
5. 5.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) it turns to oil (d) sugar crystals form
6. 6.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) baking soda (d) cooking oil
7. 7.True or false: salt is not needed for growing salt crystals. (a) True (b) False
8. 8.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny stars (d) tiny spheres
9. 9.⚖️ 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
10. 10.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) baking a cake (c) dissolving salt (d) folding paper
11. 11.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) yeast (c) a piece of string (d) a balloon
12. 12.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) sugar (b) table salt (c) sand (d) food colour
14. 14.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a magnet (d) a spoon
15. 15.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) a battery cell (d) warm water
16. 16.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) browning lemon ink (d) melting butter
17. 17.🔍 Which is the odd one out? (a) table salt (b) food colour (c) glucose powder (d) chalk powder
18. 18.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
19. 19.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) turmeric powder (d) a spoon
21. 21.True or false: cooking oil dissolves in water. (a) True (b) False
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) True (b) False
23. 23.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
24. 24.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) salt rains down (c) fish make it (d) sand is ground up
25. 25.🛟 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
26. 26.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting ice (c) rusting iron (d) melting butter
27. 27.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
28. 28.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) turmeric powder (c) a shallow dish (d) a mirror
29. 29.True or false: a spoon is 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? 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
31. 31.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a battery cell (c) a mirror (d) yeast
32. 32.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
33. 33.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
34. 34.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) sawdust (d) small pebbles
35. 35.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) crystals grow faster (d) few or no crystals
36. 36.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) folding paper (d) milk turning to curd
37. 37.⚖️ 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 measure it (b) we change it (c) we keep it the same
38. 38.True or false: table salt does not dissolve in water. (a) False (b) True
39. 39.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
40. 40.🧂 Which of these does not dissolve in water? (a) sawdust (b) food colour (c) glucose powder (d) sugar

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