Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 372 · 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.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
2. 2.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
3. 3.True or false: yeast is needed for growing salt crystals. (a) True (b) False
4. 4.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
5. 5.⚖️ 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 water (c) days to see crystals (d) the amount of salt
6. 6.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
7. 7.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a shallow dish (c) salt (d) a spoon
9. 9.🌊 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
10. 10.⚖️ 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
11. 11.True or false: sawdust does not dissolve in water. (a) True (b) False
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) salt (d) a battery cell
13. 13.🧂 Which of these does not dissolve in water? (a) cooking oil (b) glucose powder (c) table salt (d) food colour
14. 14.🛟 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
15. 15.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) melting butter (d) baking a cake
16. 16.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) turmeric powder (c) salt (d) a spoon
18. 18.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) melting ice (c) melting butter (d) freezing water
19. 19.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) True (b) False
21. 21.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
23. 23.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
24. 24.🧺 Which of these is needed for growing salt crystals? (a) salt (b) yeast (c) turmeric powder (d) a magnet
25. 25.⚖️ 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) True (b) False
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) False (b) True
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a mirror (d) a shallow dish
28. 28.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
29. 29.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
30. 30.🧈 Which of these is a change that can be undone? (a) melting ice (b) cooking an egg (c) baking a cake (d) milk turning to curd
31. 31.🧂 Which of these does not dissolve in water? (a) baking soda (b) sugar (c) sand (d) table salt
32. 32.⚖️ 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
33. 33.True or false: salt is not needed for growing salt crystals. (a) False (b) True
34. 34.⚖️ 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 same dish (b) days to see crystals (c) sunny or shady place
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) warm water (d) yeast
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 change it (c) we measure it
37. 37.True or false: baking soda dissolves in water. (a) False (b) True
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
39. 39.🔮 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
40. 40.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) water evaporates (d) salt grows roots

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