Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 842 · 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 the one thing we change? (a) the same dish (b) the amount of water (c) the amount of salt (d) sunny or shady place
2. 2.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) warm water (c) salt (d) a battery cell
3. 3.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) liquid crystals (d) no crystals
4. 4.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
5. 5.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) empty (c) magnetic (d) saturated
6. 6.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny spheres (d) tiny cubes
7. 7.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) sugar (d) sawdust
8. 8.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
9. 9.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) a spoon (d) yeast
11. 11.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
12. 12.True or false: glucose powder dissolves in water. (a) False (b) True
13. 13.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) a spoon (d) a mirror
14. 14.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) freezing water (c) melting butter (d) cooking an egg
15. 15.⚖️ 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 measure it (b) we keep it the same (c) we change it
16. 16.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) warm water (d) a balloon
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a battery cell (c) a piece of string (d) warm water
19. 19.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) True (b) False
21. 21.True or false: folding paper is a change that cannot be undone. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) table salt (b) glucose powder (c) sugar (d) small pebbles
23. 23.⚖️ 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 measure it (c) we keep it the same
24. 24.🧈 Which of these is a change that can be undone? (a) freezing water (b) browning lemon ink (c) rusting iron (d) baking a cake
25. 25.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) a shallow dish (d) yeast
27. 27.True or false: yeast is needed for growing salt crystals. (a) True (b) False
28. 28.⚖️ 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
29. 29.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
30. 30.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
31. 31.🔍 Which is the odd one out? (a) chalk powder (b) glucose powder (c) sugar (d) baking soda
32. 32.True or false: sugar dissolves in water. (a) True (b) False
33. 33.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) yeast (c) turmeric powder (d) a battery cell
34. 34.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) dissolving salt (c) melting butter (d) freezing water
35. 35.🧂 Which of these dissolves in water? (a) chalk powder (b) small pebbles (c) cooking oil (d) table salt
36. 36.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a magnet (c) a mirror (d) salt
37. 37.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to change its colour (d) to cool the water
38. 38.🧂 Which of these dissolves in water? (a) cooking oil (b) food colour (c) sand (d) chalk powder
39. 39.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
40. 40.True or false: browning lemon ink is a change that can be undone. (a) True (b) False

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