Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 240 · 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: cooking an egg is a change that cannot be undone. (a) True (b) False
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
3. 3.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a mirror (c) a spoon (d) a piece of string
4. 4.⚖️ 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 amount of salt (c) sunny or shady place
5. 5.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
6. 6.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) salt crystals form (d) it turns to butter
7. 7.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) dissolving salt (c) baking a cake (d) cooking an egg
8. 8.True or false: rusting iron is a change that can be undone. (a) True (b) False
9. 9.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) browning lemon ink (c) folding paper (d) melting ice
10. 10.⚖️ 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 keep it the same (c) we measure it
11. 11.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) sawdust (d) baking soda
12. 12.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) glucose powder (d) cooking oil
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) True (b) False
14. 14.⚖️ 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 amount of water (b) sunny or shady place (c) days to see crystals (d) the amount of salt
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
16. 16.⚖️ 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 change it (c) we measure it
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) turmeric powder (b) a piece of string (c) a spoon (d) warm water
18. 18.🔍 Which is the odd one out? (a) table salt (b) cooking oil (c) chalk powder (d) sand
19. 19.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) True (b) False
21. 21.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
22. 22.🛟 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
23. 23.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a spoon (d) a battery cell
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) warm water (c) a shallow dish (d) a spoon
26. 26.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) crystals grow faster (d) few or no crystals
27. 27.⚖️ 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 change it (b) we keep it the same (c) we measure it
28. 28.🧂 Which of these dissolves in water? (a) cooking oil (b) small pebbles (c) glucose powder (d) sawdust
29. 29.🔍 Which is the odd one out? (a) table salt (b) cooking oil (c) food colour (d) sugar
30. 30.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny stars (d) tiny cubes
31. 31.True or false: salt is needed for growing salt crystals. (a) False (b) True
32. 32.🛟 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
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
34. 34.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
35. 35.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
36. 36.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) yeast (c) a magnet (d) a mirror
37. 37.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of water (b) days to see crystals (c) sunny or shady place (d) the kind of salt
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) False (b) True
40. 40.⚖️ 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 measure it (b) we change it (c) we keep it the same

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