Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 174 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) warm water (c) salt (d) a shallow dish
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we keep it the same (c) we change it
3. 3.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
4. 4.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) baking soda (d) sawdust
5. 5.True or false: salt is needed for growing salt crystals. (a) True (b) False
6. 6.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) crystals grow faster (d) it fizzes
7. 7.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
8. 8.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
9. 9.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
10. 10.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) folding paper (d) browning lemon ink
11. 11.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a shallow dish (c) a mirror (d) a magnet
12. 12.🔍 Which is the odd one out? (a) cooking oil (b) table salt (c) sand (d) sawdust
13. 13.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) food colour (d) small pebbles
14. 14.🛟 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
15. 15.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) it turns to oil (d) salt crystals form
16. 16.🔍 Which is the odd one out? (a) chalk powder (b) sawdust (c) glucose powder (d) small pebbles
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) warm water (d) a battery cell
18. 18.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a balloon (c) turmeric powder (d) salt
19. 19.🧂 Which of these does not dissolve in water? (a) glucose powder (b) table salt (c) sugar (d) sawdust
20. 20.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) empty (d) magnetic
21. 21.True or false: food colour dissolves in water. (a) False (b) True
22. 22.⚖️ 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 change it (b) we keep it the same (c) we measure it
23. 23.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
24. 24.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
25. 25.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny spheres (d) tiny cubes
26. 26.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) no crystals (d) bigger crystals
27. 27.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
28. 28.🧈 Which of these is a change that can be undone? (a) freezing water (b) cooking an egg (c) baking a cake (d) milk turning to curd
29. 29.⚖️ 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 change it (b) we keep it the same (c) we measure it
30. 30.🧂 Which of these does not dissolve in water? (a) glucose powder (b) small pebbles (c) baking soda (d) food colour
31. 31.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) sawdust (b) glucose powder (c) food colour (d) baking soda
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a piece of string (d) a magnet
34. 34.⚖️ 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) False (b) True
35. 35.True or false: small pebbles does not dissolve in water. (a) True (b) False
36. 36.⚖️ 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 kind of salt (b) the amount of salt (c) sunny or shady place (d) days to see crystals
37. 37.⚖️ 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) sunny or shady place (c) the kind of salt (d) days to see crystals
38. 38.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
39. 39.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True

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