Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 151 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) a mirror (d) salt
2. 2.🧈 Which of these is a change that can be undone? (a) baking a cake (b) melting butter (c) cooking an egg (d) milk turning to curd
3. 3.🧂 Which of these dissolves in water? (a) sawdust (b) chalk powder (c) sand (d) glucose powder
4. 4.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
5. 5.🧈 Which of these is a change that can be undone? (a) rusting iron (b) dissolving salt (c) baking a cake (d) browning lemon ink
6. 6.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
7. 7.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) sugar (d) sawdust
8. 8.⚖️ 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 kind of salt (c) days to see crystals (d) the amount of salt
9. 9.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
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 can be undone? (a) milk turning to curd (b) rusting iron (c) browning lemon ink (d) freezing water
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) True (b) False
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.⚖️ 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) False (b) True
15. 15.True or false: salt is not needed for growing salt crystals. (a) True (b) False
16. 16.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) crystals grow faster (d) it fizzes
17. 17.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
18. 18.True or false: freezing water is a change that cannot be undone. (a) False (b) True
19. 19.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) a friend who is running (d) the youngest child
20. 20.⚖️ 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) the amount of water (c) the kind of salt (d) days to see crystals
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 a change that cannot be undone? (a) melting ice (b) dissolving salt (c) rusting iron (d) melting butter
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a balloon (c) a spoon (d) a shallow dish
24. 24.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) it turns to butter (d) salt crystals form
25. 25.⚖️ 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 keep it the same (c) we measure it
26. 26.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
27. 27.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
28. 28.🔍 Which is the odd one out? (a) small pebbles (b) table salt (c) sand (d) cooking oil
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) a piece of string (d) a balloon
30. 30.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) turmeric powder (c) a spoon (d) a mirror
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a shallow dish (d) a magnet
32. 32.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) cooking oil (d) sugar
33. 33.⚖️ 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 measure it (b) we change it (c) we keep it the same
34. 34.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
35. 35.🧂 Which of these does not dissolve in water? (a) glucose powder (b) chalk powder (c) sugar (d) baking soda
36. 36.🧈 Which of these is a change that can be undone? (a) baking a cake (b) folding paper (c) rusting iron (d) milk turning to curd
37. 37.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
38. 38.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) melting ice (d) milk turning to curd
39. 39.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
40. 40.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) water evaporates (d) salt eats water

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