Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 22 · 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.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to oil (d) it turns to butter
2. 2.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
3. 3.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
4. 4.True or false: rusting iron is a change that can be undone. (a) False (b) True
5. 5.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) empty (d) magnetic
6. 6.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) bigger crystals (d) smaller crystals
7. 7.🔍 Which is the odd one out? (a) sawdust (b) chalk powder (c) sand (d) table salt
8. 8.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
9. 9.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
10. 10.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
11. 11.⚖️ 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
12. 12.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) food colour (d) small pebbles
13. 13.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) safe from small children (d) in a busy doorway
14. 14.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
15. 15.⚖️ 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 change it (b) we measure it (c) we keep it the same
16. 16.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
17. 17.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
18. 18.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sand is ground up (d) sea water evaporates
19. 19.⚖️ 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
20. 20.🧈 Which of these is a change that can be undone? (a) rusting iron (b) milk turning to curd (c) cooking an egg (d) freezing water
21. 21.🧂 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
22. 22.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) turmeric powder (c) salt (d) warm water
23. 23.True or false: melting butter is a change that cannot be undone. (a) True (b) False
24. 24.⚖️ 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 measure it (b) we keep it the same (c) we change it
25. 25.⚖️ 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
26. 26.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
27. 27.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
28. 28.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
29. 29.🧂 Which of these does not dissolve in water? (a) cooking oil (b) food colour (c) sugar (d) glucose powder
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the amount of water (c) days to see crystals
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
32. 32.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) melting butter (d) browning lemon ink
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) sunny or shady place (b) the amount of salt (c) days to see crystals (d) the same dish
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) salt (d) turmeric powder
35. 35.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
36. 36.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) cooking oil (b) baking soda (c) sand (d) small pebbles
38. 38.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
39. 39.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
40. 40.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed

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