Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 457 · 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: a shallow dish is not needed for growing salt crystals. (a) True (b) False
2. 2.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
3. 3.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
4. 4.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
5. 5.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) browning lemon ink (d) dissolving salt
6. 6.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) cooking oil (d) table salt
7. 7.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) browning lemon ink (d) melting butter
8. 8.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) table salt (d) chalk powder
9. 9.⚖️ 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 kind of salt (b) sunny or shady place (c) days to see crystals (d) the same dish
10. 10.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) next to the baby (d) on the edge of a table
11. 11.🔍 Which is the odd one out? (a) cooking oil (b) table salt (c) small pebbles (d) sand
12. 12.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) no crystals (d) liquid crystals
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a balloon (c) a piece of string (d) warm water
14. 14.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) salt (d) a battery cell
15. 15.🧂 Which of these does not dissolve in water? (a) baking soda (b) sand (c) sugar (d) table salt
16. 16.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
17. 17.🔍 Which is the odd one out? (a) table salt (b) sawdust (c) glucose powder (d) sugar
18. 18.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
19. 19.🔍 Which is the odd one out? (a) baking soda (b) sand (c) chalk powder (d) small pebbles
20. 20.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
21. 21.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) salt crystals form (d) sugar crystals form
22. 22.True or false: sawdust dissolves in water. (a) False (b) True
23. 23.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it fizzes (d) it turns sweet
24. 24.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to make it fizz (d) to cool the water
25. 25.🧂 Which of these dissolves in water? (a) baking soda (b) small pebbles (c) sawdust (d) chalk powder
26. 26.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) fish make it (c) sand is ground up (d) salt rains down
27. 27.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
28. 28.True or false: table salt does not dissolve in water. (a) False (b) True
29. 29.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
30. 30.⚖️ 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 measure it (c) we keep it the same
31. 31.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a magnet (c) a piece of string (d) a spoon
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) salt (d) a magnet
33. 33.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) melting butter (d) cooking an egg
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) days to see crystals (c) the same dish (d) the amount of water
35. 35.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.True or false: sugar does not dissolve in water. (a) False (b) True
37. 37.True or false: salt is needed for growing salt crystals. (a) True (b) False
38. 38.🔍 Which is the odd one out? (a) glucose powder (b) food colour (c) small pebbles (d) sugar
39. 39.⚖️ 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
40. 40.⚖️ 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

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