Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 232 · 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.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
2. 2.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
3. 3.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) a piece of string (d) a battery cell
4. 4.⚖️ 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) the amount of salt (c) the same dish (d) sunny or shady place
5. 5.⚖️ 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) False (b) True
6. 6.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) dissolving salt (c) folding paper (d) melting butter
7. 7.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) saturated (d) frozen
8. 8.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
9. 9.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) freezing water (c) melting butter (d) folding paper
10. 10.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny triangles (d) tiny cubes
11. 11.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to make it very salty (c) to cool the water (d) to change its colour
12. 12.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) salt (d) a battery cell
13. 13.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
14. 14.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
15. 15.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) yeast (c) warm water (d) a shallow dish
17. 17.True or false: food colour does not dissolve in water. (a) False (b) True
18. 18.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sea water evaporates (d) sand is ground up
19. 19.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) freezing water (c) melting butter (d) melting ice
20. 20.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
21. 21.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) a spoon (c) salt (d) a piece of string
22. 22.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
23. 23.🧂 Which of these does not dissolve in water? (a) sand (b) sugar (c) baking soda (d) food colour
24. 24.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
25. 25.⚖️ 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 measure it (b) we change it (c) we keep it the same
26. 26.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a battery cell (c) a mirror (d) a balloon
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) salt (d) a battery cell
28. 28.⚖️ 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
29. 29.⚖️ 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 salt (c) the same dish (d) the kind of salt
30. 30.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) no crystals (d) bigger crystals
31. 31.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
32. 32.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
33. 33.⚖️ 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 amount of water (c) sunny or shady place
34. 34.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
35. 35.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
36. 36.True or false: folding paper is a change that can be undone. (a) False (b) True
37. 37.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
38. 38.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
39. 39.🔍 Which is the odd one out? (a) baking soda (b) small pebbles (c) table salt (d) sugar
40. 40.True or false: sugar does not dissolve in water. (a) True (b) False

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