Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 688 · 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 needed for growing salt crystals? (a) turmeric powder (b) warm water (c) a mirror (d) a balloon
2. 2.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
3. 3.True or false: table salt does not dissolve in water. (a) False (b) True
4. 4.⚖️ 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 amount of salt (b) the kind of salt (c) days to see crystals (d) the amount of water
5. 5.⚖️ 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 change it (b) we keep it the same (c) we measure it
6. 6.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
7. 7.True or false: sand dissolves in water. (a) False (b) True
8. 8.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) no crystals (d) bigger crystals
9. 9.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a shallow dish (c) a spoon (d) warm water
11. 11.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) table salt (d) cooking oil
12. 12.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) in a busy doorway (d) next to the baby
13. 13.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) melting ice (c) milk turning to curd (d) baking a cake
14. 14.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) a spoon (c) warm water (d) salt
15. 15.True or false: small pebbles does not dissolve in water. (a) True (b) False
16. 16.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
17. 17.⚖️ 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 change it (c) we measure it
18. 18.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) a grown-up (d) the youngest child
19. 19.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) salt eats water (d) water evaporates
20. 20.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
21. 21.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) turmeric powder (d) a shallow dish
22. 22.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) turmeric powder (c) salt (d) a magnet
23. 23.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) milk turning to curd (c) melting butter (d) freezing water
24. 24.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) sawdust (d) baking soda
25. 25.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.⚖️ 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 water (c) the same dish (d) sunny or shady place
27. 27.🧈 Which of these is a change that can be undone? (a) baking a cake (b) melting butter (c) browning lemon ink (d) rusting iron
28. 28.🔍 Which is the odd one out? (a) chalk powder (b) glucose powder (c) table salt (d) baking soda
29. 29.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) cooking an egg (c) melting ice (d) freezing water
30. 30.True or false: food colour does not dissolve in water. (a) True (b) False
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) salt (c) a shallow dish (d) a piece of string
32. 32.⚖️ 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
33. 33.🔍 Which is the odd one out? (a) sand (b) table salt (c) sugar (d) glucose powder
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) yeast (d) a piece of string
35. 35.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it very salty (d) to make it fizz
36. 36.⚖️ 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 measure it (c) we change it
37. 37.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) few or no crystals (d) it fizzes
38. 38.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
39. 39.⚖️ 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
40. 40.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids