Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 916 · 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.🔍 Which is the odd one out? (a) table salt (b) food colour (c) baking soda (d) cooking oil
2. 2.⚖️ 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 keep it the same (b) we change it (c) we measure it
3. 3.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
4. 4.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
5. 5.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) in a busy doorway (d) safe from small children
6. 6.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) rusting iron (c) dissolving salt (d) baking a cake
7. 7.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
8. 8.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) rusting iron (c) melting butter (d) freezing water
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
10. 10.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
11. 11.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) melting ice (d) baking a cake
12. 12.⚖️ 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) days to see crystals (c) the kind of salt
13. 13.True or false: sawdust dissolves in water. (a) False (b) True
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) the same dish (d) days to see crystals
15. 15.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) dissolving salt (c) melting butter (d) browning lemon ink
16. 16.⚖️ 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
17. 17.True or false: cooking an egg is a change that can be undone. (a) True (b) False
18. 18.True or false: table salt dissolves in water. (a) True (b) False
19. 19.True or false: folding paper is a change that cannot be undone. (a) True (b) False
20. 20.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a balloon (c) a magnet (d) turmeric powder
21. 21.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
22. 22.🧂 Which of these does not dissolve in water? (a) baking soda (b) sugar (c) food colour (d) small pebbles
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) the amount of water (b) sunny or shady place (c) days to see crystals (d) the same dish
24. 24.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
25. 25.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
26. 26.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) salt crystals form (c) it turns to butter (d) sugar crystals form
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a shallow dish (d) a magnet
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a balloon (d) salt
29. 29.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
30. 30.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) a piece of string (d) a mirror
31. 31.True or false: baking soda does not dissolve in water. (a) True (b) False
32. 32.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a piece of string (d) a mirror
34. 34.True or false: sand does not dissolve in water. (a) True (b) False
35. 35.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it fizzes (c) crystals grow faster (d) it turns sweet
36. 36.True or false: sugar dissolves in water. (a) False (b) True
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a shallow dish (c) a piece of string (d) salt
38. 38.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny triangles (c) tiny stars (d) tiny spheres
39. 39.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
40. 40.True or false: salt is not needed for growing salt crystals. (a) False (b) True

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