Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 374 · 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.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) sand is ground up (c) fish make it (d) salt rains down
2. 2.🔍 Which is the odd one out? (a) cooking oil (b) table salt (c) glucose powder (d) baking soda
3. 3.⚖️ 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 measure it (c) we keep it the same
4. 4.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) smaller crystals (d) no crystals
5. 5.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
6. 6.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) chalk powder (d) table salt
7. 7.⚖️ 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 change it (c) we keep it the same
8. 8.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) it turns sweet (d) few or no crystals
9. 9.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) baking a cake (d) melting butter
10. 10.True or false: melting ice is a change that cannot be undone. (a) True (b) False
11. 11.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
12. 12.⚖️ 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) sunny or shady place (c) days to see crystals (d) the amount of salt
13. 13.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
14. 14.True or false: cooking an egg is a change that can be undone. (a) True (b) False
15. 15.True or false: glucose powder dissolves in water. (a) False (b) True
16. 16.True or false: food colour dissolves in water. (a) True (b) False
17. 17.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) milk turning to curd (d) melting ice
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) empty (c) magnetic (d) frozen
21. 21.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
23. 23.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
24. 24.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
25. 25.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
26. 26.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
27. 27.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
28. 28.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) it turns to oil (d) salt crystals form
29. 29.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) True (b) False
31. 31.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
32. 32.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) yeast (c) warm water (d) a battery cell
33. 33.⚖️ 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) the same dish (d) the amount of salt
34. 34.True or false: sawdust dissolves in water. (a) True (b) False
35. 35.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) water evaporates (d) salt grows roots
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the amount of water (b) sunny or shady place (c) days to see crystals
37. 37.🧂 Which of these dissolves in water? (a) baking soda (b) sawdust (c) sand (d) small pebbles
38. 38.🔍 Which is the odd one out? (a) small pebbles (b) baking soda (c) cooking oil (d) sand
39. 39.🔍 Which is the odd one out? (a) baking soda (b) sugar (c) small pebbles (d) glucose powder
40. 40.True or false: yeast is not needed for growing salt crystals. (a) True (b) False

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