Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 849 · 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 turmeric powder for growing salt crystals? (a) needed (b) not needed
2. 2.🧂 Which of these does not dissolve in water? (a) sugar (b) table salt (c) food colour (d) sand
3. 3.🧂 Which of these dissolves in water? (a) cooking oil (b) glucose powder (c) sawdust (d) small pebbles
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? What do we do with “the kind of salt”? (a) we change it (b) we measure it (c) we keep it the same
6. 6.⚖️ 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 keep it the same (b) we measure it (c) we change it
7. 7.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) saturated (c) empty (d) frozen
8. 8.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) yeast (c) a magnet (d) turmeric powder
9. 9.True or false: cooking an egg is a change that can be undone. (a) True (b) False
10. 10.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
11. 11.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) a mirror (d) warm water
12. 12.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
13. 13.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) warm water (d) a magnet
15. 15.⚖️ 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
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) sawdust (b) food colour (c) table salt (d) sugar
18. 18.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) turmeric powder (d) warm water
19. 19.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) sand (d) sugar
20. 20.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to make it very salty (d) to change its colour
21. 21.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
22. 22.⚖️ 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 keep it the same (c) we change it
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) yeast (c) a shallow dish (d) salt
24. 24.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a magnet (c) a shallow dish (d) salt
25. 25.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) few or no crystals (d) it fizzes
26. 26.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
27. 27.🔍 Which is the odd one out? (a) baking soda (b) sawdust (c) sugar (d) glucose powder
28. 28.🔍 Which is the odd one out? (a) cooking oil (b) chalk powder (c) small pebbles (d) baking soda
29. 29.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) salt eats water (d) the dish melts
30. 30.True or false: melting butter is a change that cannot be undone. (a) True (b) False
31. 31.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
32. 32.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) cooking an egg (c) freezing water (d) folding paper
33. 33.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) salt (c) warm water (d) a spoon
35. 35.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) sugar (d) sawdust
36. 36.True or false: food colour does not dissolve in water. (a) True (b) False
37. 37.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) baking soda (d) chalk powder
38. 38.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) baking soda (d) chalk powder
39. 39.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a piece of string (d) a balloon
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a mirror (d) a piece of string

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