Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 91 · 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 a change that can be undone? (a) browning lemon ink (b) baking a cake (c) cooking an egg (d) dissolving salt
2. 2.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
3. 3.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
4. 4.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in 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 amount of water”? (a) we keep it the same (b) we measure it (c) we change it
6. 6.True or false: salt is not needed for growing salt crystals. (a) True (b) False
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a spoon (c) a shallow dish (d) salt
8. 8.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
9. 9.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) milk turning to curd (c) freezing water (d) melting butter
10. 10.True or false: yeast is needed for growing salt crystals. (a) True (b) False
11. 11.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) cooking an egg (c) dissolving salt (d) melting ice
12. 12.🔍 Which is the odd one out? (a) sand (b) cooking oil (c) chalk powder (d) food colour
13. 13.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) warm water (c) a shallow dish (d) a piece of string
15. 15.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) on the edge of a table (d) in a busy doorway
16. 16.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) bigger crystals (d) liquid crystals
17. 17.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) glucose powder (d) small pebbles
18. 18.⚖️ 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 same dish (b) the amount of water (c) days to see crystals (d) sunny or shady place
19. 19.🧂 Which of these dissolves in water? (a) baking soda (b) chalk powder (c) sand (d) sawdust
20. 20.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
21. 21.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
22. 22.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
23. 23.🔍 Which is the odd one out? (a) baking soda (b) small pebbles (c) sawdust (d) cooking oil
24. 24.🔍 Which is the odd one out? (a) food colour (b) table salt (c) sugar (d) small pebbles
25. 25.⚖️ 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
26. 26.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the same dish (c) the kind of salt (d) the amount of salt
28. 28.True or false: freezing water is a change that cannot be undone. (a) False (b) True
29. 29.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a battery cell (c) warm water (d) a mirror
30. 30.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a balloon (c) a magnet (d) salt
31. 31.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it fizz (c) to cool the water (d) to make it very salty
32. 32.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a spoon (c) a magnet (d) turmeric powder
33. 33.🧂 Which of these does not dissolve in water? (a) cooking oil (b) sugar (c) table salt (d) baking soda
34. 34.True or false: melting ice is a change that can be undone. (a) True (b) False
35. 35.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
36. 36.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
37. 37.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) magnetic (d) empty
38. 38.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) baking a cake (d) dissolving salt
39. 39.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) water evaporates (d) salt grows roots
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we change it (b) we keep it the same (c) we measure it

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