Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 869 · 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: table salt does not dissolve in water. (a) True (b) False
2. 2.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
3. 3.🔍 Which is the odd one out? (a) sand (b) sawdust (c) table salt (d) cooking oil
4. 4.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) salt crystals form (d) it turns to oil
5. 5.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) salt (c) a mirror (d) a magnet
6. 6.🔍 Which is the odd one out? (a) cooking oil (b) baking soda (c) food colour (d) sugar
7. 7.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) on the edge of a table (d) safe from small children
8. 8.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) folding paper (d) milk turning to curd
9. 9.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.🧂 Which of these dissolves in water? (a) small pebbles (b) table salt (c) cooking oil (d) sand
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a balloon (d) a shallow dish
12. 12.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) browning lemon ink (d) melting ice
13. 13.⚖️ 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
14. 14.⚖️ 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
15. 15.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
16. 16.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
17. 17.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) cooking oil (d) baking soda
18. 18.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) warm water (c) a shallow dish (d) a spoon
19. 19.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
20. 20.True or false: baking a cake is a change that can be undone. (a) True (b) False
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False
22. 22.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
23. 23.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
24. 24.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
25. 25.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) food colour (d) sawdust
26. 26.⚖️ 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) sunny or shady place (c) days to see crystals (d) the kind of salt
27. 27.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) milk turning to curd (c) dissolving salt (d) folding paper
28. 28.⚖️ 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) sunny or shady place (c) the amount of water
29. 29.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) the youngest child (d) a grown-up
30. 30.⚖️ 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 measure it (b) we keep it the same (c) we change it
31. 31.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) magnetic (d) frozen
32. 32.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
33. 33.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a mirror (c) a piece of string (d) a shallow dish
34. 34.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
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: glucose powder dissolves in water. (a) True (b) False
37. 37.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) salt grows roots (d) the dish melts
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) the same dish (c) the amount of salt (d) days to see crystals
39. 39.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
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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