Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 181 · 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 a shallow dish for growing salt crystals? (a) not needed (b) needed
2. 2.⚖️ 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) sunny or shady place (d) the amount of water
3. 3.⚖️ 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 keep it the same (b) we change it (c) we measure it
4. 4.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
5. 5.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) crystals grow faster (d) it fizzes
6. 6.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
7. 7.⚖️ 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 keep it the same (b) we measure it (c) we change it
8. 8.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny spheres (d) tiny stars
9. 9.True or false: food colour does not dissolve in water. (a) False (b) True
10. 10.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to change its colour (c) to cool the water (d) to make it fizz
11. 11.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) melting butter (c) rusting iron (d) baking a cake
12. 12.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
13. 13.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a battery cell (c) turmeric powder (d) a mirror
14. 14.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) on the edge of a table (d) in a busy doorway
15. 15.True or false: glucose powder dissolves in water. (a) True (b) False
16. 16.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) a shallow dish (c) a piece of string (d) warm water
17. 17.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) warm water (c) a balloon (d) turmeric powder
18. 18.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) salt (d) a magnet
20. 20.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) a mirror (d) salt
21. 21.🧂 Which of these dissolves in water? (a) sawdust (b) food colour (c) chalk powder (d) sand
22. 22.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
23. 23.True or false: sugar dissolves in water. (a) False (b) True
24. 24.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) turmeric powder (c) warm water (d) a spoon
26. 26.True or false: warm water is needed for growing salt crystals. (a) False (b) True
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a spoon (d) a balloon
28. 28.⚖️ 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 keep it the same (c) we change it
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
30. 30.⚖️ 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 keep it the same (c) we change it
31. 31.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) sugar (d) chalk powder
32. 32.🧂 Which of these dissolves in water? (a) small pebbles (b) table salt (c) sand (d) cooking oil
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) True (b) False
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the kind of salt (c) days to see crystals
35. 35.🔍 Which is the odd one out? (a) chalk powder (b) sugar (c) small pebbles (d) sand
36. 36.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
37. 37.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
38. 38.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
39. 39.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) sand (d) baking soda
40. 40.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed

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