Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 597 · 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.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
2. 2.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
3. 3.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) melting ice (c) freezing water (d) folding paper
4. 4.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to cool the water (d) to make it very salty
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) the same dish (b) the amount of salt (c) days to see crystals (d) sunny or shady place
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) warm water (c) salt (d) a piece of string
7. 7.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) sawdust (d) table salt
8. 8.⚖️ 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 same dish (c) sunny or shady place
9. 9.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.True or false: freezing water is a change that cannot be undone. (a) False (b) True
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) warm water (d) a mirror
12. 12.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) baking soda (d) sawdust
13. 13.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) folding paper (d) baking a cake
14. 14.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) food colour (d) cooking oil
15. 15.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
16. 16.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) a friend who is running (d) nobody needs to
17. 17.🧂 Which of these does not dissolve in water? (a) baking soda (b) food colour (c) chalk powder (d) glucose powder
18. 18.True or false: warm water is needed for growing salt crystals. (a) False (b) True
19. 19.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a magnet (c) a piece of string (d) a spoon
22. 22.🧂 Which of these does not dissolve in water? (a) table salt (b) glucose powder (c) sawdust (d) sugar
23. 23.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) freezing water (c) folding paper (d) milk turning to curd
24. 24.True or false: yeast is needed for growing salt crystals. (a) False (b) True
25. 25.🔍 Which is the odd one out? (a) sugar (b) cooking oil (c) sand (d) small pebbles
26. 26.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
27. 27.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) few or no crystals (d) it turns sweet
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a piece of string (c) a spoon (d) a shallow dish
29. 29.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
30. 30.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
31. 31.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) glucose powder (d) sawdust
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) warm water (c) a piece of string (d) a shallow dish
33. 33.True or false: table salt dissolves in water. (a) True (b) False
34. 34.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a battery cell (c) yeast (d) a mirror
35. 35.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) next to the baby (d) safe from small children
36. 36.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
37. 37.⚖️ 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 change it (c) we keep it the same
38. 38.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) True (b) False
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) warm water (d) a balloon

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