Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 456 · 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.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
2. 2.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) sugar crystals form (d) salt crystals form
3. 3.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) milk turning to curd (d) freezing water
4. 4.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) water evaporates (d) salt eats water
5. 5.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
6. 6.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
7. 7.🧂 Which of these does not dissolve in water? (a) baking soda (b) cooking oil (c) sugar (d) food colour
8. 8.⚖️ 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
9. 9.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) in a busy doorway (d) on the edge of a table
10. 10.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sea water evaporates (c) salt rains down (d) sand is ground up
11. 11.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) cooking oil (d) baking soda
12. 12.True or false: cooking oil does not dissolve in water. (a) False (b) True
13. 13.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
14. 14.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a shallow dish (c) a mirror (d) a piece of string
15. 15.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a battery cell (c) a balloon (d) a mirror
16. 16.🧂 Which of these does not dissolve in water? (a) small pebbles (b) table salt (c) sugar (d) glucose powder
17. 17.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) salt (c) a piece of string (d) a shallow dish
19. 19.True or false: folding paper is a change that can be undone. (a) False (b) True
20. 20.⚖️ 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
21. 21.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) sugar (d) chalk powder
22. 22.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) salt (d) a magnet
23. 23.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
24. 24.⚖️ 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) True (b) False
25. 25.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) no crystals (d) liquid crystals
26. 26.True or false: salt is not needed for growing salt crystals. (a) True (b) False
27. 27.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) turmeric powder (c) salt (d) a balloon
28. 28.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
29. 29.⚖️ 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 change it (b) we measure it (c) we keep it the same
30. 30.⚖️ 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) days to see crystals (b) the amount of water (c) the same dish (d) sunny or shady place
31. 31.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
32. 32.⚖️ 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 keep it the same (c) we measure it
33. 33.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting butter (c) freezing water (d) baking a cake
34. 34.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
35. 35.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a shallow dish (d) yeast
37. 37.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
38. 38.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny cubes (c) tiny triangles (d) tiny stars
39. 39.⚖️ 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
40. 40.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False

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