Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 241 · 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 is the odd one out? (a) sand (b) glucose powder (c) food colour (d) table salt
2. 2.🔮 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
3. 3.True or false: sawdust does not dissolve in water. (a) False (b) True
4. 4.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) the kind of salt (c) sunny or shady place
6. 6.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
7. 7.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) next to the baby (d) in a busy doorway
8. 8.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) bigger crystals (d) liquid crystals
9. 9.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
10. 10.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a battery cell (c) a shallow dish (d) turmeric powder
11. 11.🧂 Which of these dissolves in water? (a) small pebbles (b) glucose powder (c) sand (d) chalk powder
12. 12.🔍 Which is the odd one out? (a) baking soda (b) sawdust (c) cooking oil (d) sand
13. 13.⚖️ 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 measure it (b) we change it (c) we keep it the same
14. 14.True or false: sand does not dissolve in water. (a) False (b) True
15. 15.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
16. 16.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to change its colour (d) to make it very salty
17. 17.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
18. 18.True or false: small pebbles dissolves in water. (a) False (b) True
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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) turmeric powder (d) a shallow dish
21. 21.⚖️ 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 keep it the same (c) we change it
22. 22.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) cooking an egg (d) melting ice
23. 23.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
24. 24.🔍 Which is the odd one out? (a) sawdust (b) glucose powder (c) sand (d) cooking oil
25. 25.⚖️ 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 amount of salt (b) sunny or shady place (c) the kind of salt (d) the amount of water
26. 26.🔍 Which is the odd one out? (a) food colour (b) sawdust (c) sand (d) small pebbles
27. 27.True or false: folding paper is a change that cannot be undone. (a) False (b) True
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
29. 29.⚖️ 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 measure it (b) we keep it the same (c) we change it
30. 30.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
31. 31.True or false: baking soda does not dissolve in water. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) sand (b) table salt (c) chalk powder (d) sawdust
33. 33.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
34. 34.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) yeast (c) a piece of string (d) warm water
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) days to see crystals (c) the amount of salt (d) the amount of water
37. 37.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) cooking an egg (c) melting ice (d) freezing water
38. 38.True or false: table salt does not dissolve in water. (a) True (b) False
39. 39.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) magnetic (c) frozen (d) empty
40. 40.⚖️ 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 keep it the same (b) we measure it (c) we change it

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