Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 769 · 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 of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) dissolving salt (d) baking a cake
2. 2.⚖️ 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) the kind of salt (c) days to see crystals (d) the amount of water
3. 3.⚖️ 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
4. 4.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
5. 5.True or false: table salt does not dissolve in water. (a) True (b) False
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) salt (d) a balloon
7. 7.🧂 Which of these does not dissolve in water? (a) sugar (b) table salt (c) glucose powder (d) chalk powder
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) True (b) False
9. 9.True or false: rusting iron is a change that can be undone. (a) False (b) True
10. 10.True or false: melting ice is a change that cannot be undone. (a) True (b) False
11. 11.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
12. 12.⚖️ 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 change it (c) we measure it
13. 13.⚖️ 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 kind of salt (b) sunny or shady place (c) days to see crystals (d) the amount of salt
14. 14.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
15. 15.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
16. 16.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) baking a cake (d) melting butter
17. 17.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
18. 18.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) melting butter (c) freezing water (d) melting ice
19. 19.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) sand (d) sugar
20. 20.⚖️ 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
21. 21.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
22. 22.⚖️ 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
23. 23.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a battery cell (d) a shallow dish
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) warm water (d) a mirror
26. 26.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
27. 27.True or false: cooking an egg is a change that can be undone. (a) False (b) True
28. 28.True or false: sand does not dissolve in water. (a) False (b) True
29. 29.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny spheres (d) tiny cubes
30. 30.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
31. 31.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) sea water evaporates (d) fish make it
32. 32.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) the dish melts (c) salt grows roots (d) salt eats water
33. 33.True or false: glucose powder does not dissolve in water. (a) False (b) True
34. 34.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) crystals grow faster (d) few or no crystals
35. 35.⚖️ 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) False (b) True
36. 36.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a spoon (d) a battery cell
37. 37.⚖️ 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
38. 38.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
39. 39.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
40. 40.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) glucose powder (d) cooking oil

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