Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 930 · 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.⚖️ 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) days to see crystals (c) the amount of salt
2. 2.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) fish make it (d) sand is ground up
3. 3.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) frozen (d) magnetic
4. 4.⚖️ 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
5. 5.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
6. 6.True or false: cooking an egg is a change that can be undone. (a) False (b) True
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) salt (c) a spoon (d) a shallow dish
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a battery cell (d) a spoon
9. 9.True or false: cooking oil dissolves in water. (a) True (b) False
10. 10.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
11. 11.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) sugar (d) cooking oil
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) sunny or shady place (c) the kind of salt (d) days to see crystals
13. 13.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) small pebbles (d) sugar
14. 14.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) glucose powder (d) small pebbles
15. 15.True or false: melting ice is a change that can be undone. (a) False (b) True
16. 16.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
17. 17.True or false: freezing water is a change that can be undone. (a) True (b) False
18. 18.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny stars (d) tiny triangles
19. 19.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a magnet (c) a mirror (d) a battery cell
20. 20.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) bigger crystals (d) no crystals
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
22. 22.True or false: chalk powder dissolves in water. (a) False (b) True
23. 23.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) a mirror (c) a battery cell (d) a magnet
24. 24.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) freezing water (d) rusting iron
25. 25.True or false: sugar dissolves in water. (a) False (b) True
26. 26.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) few or no crystals (d) it turns sweet
27. 27.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) freezing water (c) melting ice (d) folding paper
28. 28.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
29. 29.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) safe from small children (d) in a busy doorway
30. 30.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
31. 31.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
32. 32.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) glucose powder (d) cooking oil
33. 33.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) the dish melts (d) water evaporates
34. 34.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
35. 35.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
36. 36.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
37. 37.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) yeast (c) a shallow dish (d) a spoon
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 measure it (b) we change it (c) we keep it the same
40. 40.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water

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