Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 654 · 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? True or false: sunny or shady place is kept the same. (a) True (b) False
2. 2.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) dissolving salt (c) freezing water (d) folding paper
3. 3.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) melting ice (d) milk turning to curd
4. 4.🧂 Which of these does not dissolve in water? (a) table salt (b) sand (c) baking soda (d) food colour
5. 5.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
6. 6.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) dissolving salt (c) freezing water (d) cooking an egg
7. 7.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) sugar (d) sawdust
8. 8.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
9. 9.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) smaller crystals (d) liquid crystals
10. 10.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) water evaporates (d) salt eats water
11. 11.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to cool the water (d) to change its colour
12. 12.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) rusting iron (c) melting butter (d) melting ice
13. 13.True or false: table salt does not dissolve in water. (a) True (b) False
14. 14.🔍 Which is the odd one out? (a) small pebbles (b) cooking oil (c) food colour (d) sawdust
15. 15.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) milk turning to curd (d) melting butter
16. 16.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) cooking oil (d) small pebbles
17. 17.True or false: freezing water is a change that cannot be undone. (a) False (b) True
18. 18.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) table salt (d) cooking oil
19. 19.True or false: sugar does not dissolve in water. (a) False (b) True
20. 20.True or false: melting ice is a change that can be undone. (a) True (b) False
21. 21.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it turns sweet (d) it fizzes
22. 22.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny triangles (c) tiny stars (d) tiny spheres
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) a mirror (d) salt
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) salt (c) a spoon (d) a piece of string
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
26. 26.⚖️ 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 keep it the same (c) we measure it
27. 27.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
28. 28.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
29. 29.True or false: salt is not needed for growing salt crystals. (a) False (b) True
30. 30.True or false: food colour dissolves in water. (a) False (b) True
31. 31.🌊 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
32. 32.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) browning lemon ink (d) dissolving salt
33. 33.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
34. 34.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) freezing water (d) baking a cake
35. 35.⚖️ 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 water (b) the amount of salt (c) the kind of salt (d) sunny or shady place
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a balloon (d) salt
37. 37.🔍 Which is the odd one out? (a) sand (b) sawdust (c) chalk powder (d) table salt
38. 38.🧂 Which of these dissolves in water? (a) small pebbles (b) cooking oil (c) baking soda (d) chalk powder
39. 39.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.⚖️ 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 amount of water

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