Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 957 · 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.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sand is ground up (c) sea water evaporates (d) salt rains down
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) yeast (d) salt
3. 3.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) turmeric powder (c) a shallow dish (d) salt
5. 5.🧈 Which of these is a change that can be undone? (a) melting butter (b) milk turning to curd (c) cooking an egg (d) browning lemon ink
6. 6.True or false: sand does not dissolve in water. (a) True (b) False
7. 7.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) salt grows roots (d) water evaporates
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we keep it the same (b) we change it (c) we measure it
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 measure it (b) we keep it the same (c) we change it
10. 10.⚖️ 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) sunny or shady place (c) the same dish
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the amount of water (c) sunny or shady place (d) the amount of salt
12. 12.⚖️ 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
13. 13.🧂 Which of these dissolves in water? (a) sawdust (b) glucose powder (c) small pebbles (d) chalk powder
14. 14.⚖️ 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
15. 15.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
16. 16.True or false: sugar does not dissolve in water. (a) False (b) True
17. 17.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) yeast (c) a battery cell (d) a mirror
18. 18.True or false: cooking an egg is a change that can be undone. (a) True (b) False
19. 19.⚖️ 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
20. 20.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) small pebbles (d) sugar
21. 21.🔍 Which is the odd one out? (a) glucose powder (b) sawdust (c) chalk powder (d) sand
22. 22.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
23. 23.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny cubes (d) tiny spheres
24. 24.⚖️ 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 kind of salt (c) sunny or shady place
25. 25.True or false: freezing water is a change that cannot be undone. (a) True (b) False
26. 26.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
27. 27.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) the youngest child (d) nobody needs to
28. 28.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
29. 29.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
30. 30.⚖️ 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
31. 31.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
32. 32.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a shallow dish (d) a magnet
34. 34.True or false: melting ice is a change that can be undone. (a) False (b) True
35. 35.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
36. 36.True or false: cooking oil does not dissolve in water. (a) False (b) True
37. 37.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
38. 38.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it turns sweet (d) it fizzes
39. 39.True or false: salt is not needed for growing salt crystals. (a) True (b) False
40. 40.True or false: small pebbles does not dissolve in water. (a) True (b) False

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