Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 3 · 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 of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) a magnet (d) warm water
2. 2.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) small pebbles (d) food colour
3. 3.⚖️ 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 kind of salt (b) sunny or shady place (c) the same dish (d) days to see crystals
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) sunny or shady place (b) days to see crystals (c) the amount of salt
5. 5.True or false: melting butter is a change that cannot be undone. (a) True (b) False
6. 6.True or false: small pebbles dissolves in water. (a) True (b) False
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) warm water (c) a spoon (d) a shallow dish
8. 8.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) yeast (d) salt
9. 9.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.True or false: sand dissolves in water. (a) False (b) True
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
12. 12.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
13. 13.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
14. 14.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
15. 15.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
16. 16.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sand is ground up (c) salt rains down (d) sea water evaporates
17. 17.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny cubes (d) tiny stars
18. 18.🔍 Which is the odd one out? (a) sugar (b) cooking oil (c) sawdust (d) sand
19. 19.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a spoon (c) a shallow dish (d) turmeric powder
20. 20.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) table salt (d) small pebbles
21. 21.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
22. 22.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) water evaporates (d) salt grows roots
23. 23.True or false: freezing water is a change that can be undone. (a) False (b) True
24. 24.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) glucose powder (d) sawdust
25. 25.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
26. 26.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
27. 27.⚖️ 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
28. 28.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) table salt (d) sawdust
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (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 keep it the same (b) we change it (c) we measure it
31. 31.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
32. 32.True or false: cooking oil dissolves in water. (a) True (b) False
33. 33.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
35. 35.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) in a busy doorway (d) on the edge of a table
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a shallow dish (d) a balloon
37. 37.True or false: baking soda does not dissolve in water. (a) False (b) True
38. 38.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
39. 39.🧺 Do we need a piece of string 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? Which of these is the one thing we change? (a) the same dish (b) sunny or shady place (c) the amount of salt (d) the amount of water

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