Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 635 · 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.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
2. 2.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a battery cell (c) a spoon (d) a mirror
3. 3.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) empty (d) saturated
4. 4.⚖️ 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
5. 5.⚖️ 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
6. 6.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) yeast (d) warm water
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
10. 10.⚖️ 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 change it (b) we measure it (c) we keep it the same
11. 11.⚖️ 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) days to see crystals (b) sunny or shady place (c) the kind of salt (d) the same dish
12. 12.True or false: melting butter is a change that can be undone. (a) False (b) True
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) False (b) True
14. 14.🔍 Which is the odd one out? (a) table salt (b) sawdust (c) food colour (d) baking soda
15. 15.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a battery cell (c) salt (d) yeast
16. 16.🔍 Which is the odd one out? (a) sugar (b) sand (c) glucose powder (d) table salt
17. 17.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
18. 18.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it fizz (c) to make it very salty (d) to cool the water
19. 19.True or false: freezing water is a change that cannot be undone. (a) True (b) False
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the amount of salt (b) days to see crystals (c) sunny or shady place
21. 21.🧂 Which of these does not dissolve in water? (a) baking soda (b) sand (c) sugar (d) glucose powder
22. 22.True or false: salt is needed for growing salt crystals. (a) True (b) False
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the same dish (c) the amount of salt (d) the kind of salt
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a shallow dish (d) a magnet
25. 25.True or false: baking soda does not dissolve in water. (a) False (b) True
26. 26.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
27. 27.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny spheres (c) tiny cubes (d) tiny stars
28. 28.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) safe from small children (d) in a busy doorway
29. 29.🧂 Which of these dissolves in water? (a) cooking oil (b) food colour (c) sand (d) chalk powder
30. 30.True or false: cooking oil does not dissolve in water. (a) False (b) True
31. 31.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) crystals grow faster (d) few or no crystals
32. 32.True or false: cooking oil dissolves in water. (a) True (b) False
33. 33.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
34. 34.🔍 Which is the odd one out? (a) chalk powder (b) baking soda (c) small pebbles (d) cooking oil
35. 35.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) baking a cake (c) cooking an egg (d) browning lemon ink
36. 36.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) it turns to oil (d) salt crystals form
37. 37.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
38. 38.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
39. 39.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
40. 40.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running

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