Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 211 · 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.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) saturated (d) frozen
2. 2.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) few or no crystals (d) it fizzes
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a mirror (d) a piece of string
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
5. 5.🧈 Which of these is a change that can be undone? (a) baking a cake (b) milk turning to curd (c) freezing water (d) rusting iron
6. 6.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
7. 7.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
8. 8.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
9. 9.⚖️ 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
10. 10.⚖️ 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) the same dish (c) days to see crystals
11. 11.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a magnet (c) warm water (d) a balloon
12. 12.🔍 Which is the odd one out? (a) chalk powder (b) baking soda (c) small pebbles (d) sawdust
13. 13.🔍 Which is the odd one out? (a) small pebbles (b) glucose powder (c) chalk powder (d) sand
14. 14.⚖️ 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
15. 15.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) food colour (d) cooking oil
16. 16.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a friend who is running (d) a grown-up
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) turmeric powder (b) warm water (c) a piece of string (d) salt
18. 18.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
19. 19.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sea water evaporates (d) sand is ground up
20. 20.🧂 Which of these dissolves in water? (a) small pebbles (b) sawdust (c) glucose powder (d) cooking oil
21. 21.⚖️ 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
22. 22.🛟 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
23. 23.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
24. 24.⚖️ 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) False (b) True
25. 25.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
26. 26.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a shallow dish (c) a spoon (d) salt
28. 28.🧂 Which of these does not dissolve in water? (a) chalk powder (b) sugar (c) food colour (d) table salt
29. 29.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
30. 30.True or false: yeast is needed for growing salt crystals. (a) False (b) True
31. 31.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
32. 32.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
33. 33.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
34. 34.🔍 Which is the odd one out? (a) sand (b) table salt (c) baking soda (d) sugar
35. 35.True or false: sawdust dissolves in water. (a) False (b) True
36. 36.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) yeast (d) a piece of string
37. 37.🔍 Which is the odd one out? (a) sugar (b) sand (c) sawdust (d) small pebbles
38. 38.🧂 Which of these does not dissolve in water? (a) cooking oil (b) food colour (c) sugar (d) glucose powder
39. 39.True or false: melting ice is a change that can be undone. (a) True (b) False
40. 40.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to cool the water (c) to make it fizz (d) to change its colour

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