Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 722 · 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 is the odd one out? (a) food colour (b) small pebbles (c) sawdust (d) sand
2. 2.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
3. 3.🔍 Which is the odd one out? (a) sugar (b) sawdust (c) glucose powder (d) table salt
4. 4.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
5. 5.🧂 Which of these does not dissolve in water? (a) sugar (b) cooking oil (c) glucose powder (d) food colour
6. 6.True or false: freezing water is a change that can be undone. (a) True (b) False
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
8. 8.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
9. 9.🔍 Which is the odd one out? (a) sawdust (b) small pebbles (c) sugar (d) cooking oil
10. 10.⚖️ 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 same dish (b) days to see crystals (c) the amount of salt (d) the amount of water
11. 11.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
12. 12.⚖️ 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) days to see crystals (c) the amount of water (d) sunny or shady place
13. 13.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
14. 14.⚖️ 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
15. 15.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
16. 16.⚖️ 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 measure it (c) we change it
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a piece of string (c) a mirror (d) a spoon
18. 18.⚖️ 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
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) a magnet (d) warm water
20. 20.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) baking a cake (c) dissolving salt (d) melting butter
21. 21.🔍 Which is the odd one out? (a) baking soda (b) sawdust (c) small pebbles (d) chalk powder
22. 22.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) in a busy doorway (d) on the edge of a table
23. 23.True or false: salt is needed for growing salt crystals. (a) True (b) False
24. 24.True or false: rusting iron is a change that can be undone. (a) False (b) True
25. 25.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) salt (c) a piece of string (d) a spoon
27. 27.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sea water evaporates (c) sand is ground up (d) salt rains down
28. 28.True or false: cooking oil does not dissolve in water. (a) False (b) True
29. 29.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny cubes (c) tiny triangles (d) tiny spheres
30. 30.⚖️ 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
31. 31.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) it turns sweet (d) few or no crystals
32. 32.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) a friend who is running (d) nobody needs to
33. 33.⚖️ 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 change it (c) we measure it
34. 34.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
35. 35.True or false: freezing water is a change that cannot be undone. (a) True (b) False
36. 36.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) baking soda (d) small pebbles
37. 37.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
38. 38.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
39. 39.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) salt crystals form (d) it turns to oil
40. 40.True or false: baking a cake is a change that cannot be undone. (a) False (b) True

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