Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 921 · 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.⚖️ 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
2. 2.⚖️ 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 change it (b) we keep it the same (c) we measure it
3. 3.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
4. 4.True or false: salt is not needed for growing salt crystals. (a) True (b) False
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) turmeric powder (c) a shallow dish (d) warm water
6. 6.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) rusting iron (c) freezing water (d) folding paper
7. 7.🧂 Which of these dissolves in water? (a) table salt (b) cooking oil (c) chalk powder (d) sand
8. 8.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
9. 9.⚖️ 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 amount of salt (c) days to see crystals
10. 10.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
11. 11.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt grows roots (d) salt eats water
12. 12.⚖️ 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
13. 13.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to cool the water (d) to change its colour
14. 14.🔍 Which is the odd one out? (a) glucose powder (b) food colour (c) baking soda (d) sand
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
16. 16.🧂 Which of these does not dissolve in water? (a) baking soda (b) table salt (c) sugar (d) sawdust
17. 17.⚖️ 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) the kind of salt (c) sunny or shady place
18. 18.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny triangles (d) tiny spheres
19. 19.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) on the edge of a table (d) next to the baby
20. 20.⚖️ 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 measure it (b) we keep it the same (c) we change it
21. 21.True or false: folding paper is a change that cannot be undone. (a) False (b) True
22. 22.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) turmeric powder (c) a battery cell (d) a piece of string
23. 23.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a battery cell (c) warm water (d) a mirror
24. 24.True or false: cooking an egg is a change that can be undone. (a) False (b) True
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) yeast (c) salt (d) a spoon
26. 26.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
27. 27.True or false: glucose powder dissolves in water. (a) False (b) True
28. 28.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a battery cell (c) a spoon (d) a piece of string
29. 29.🧺 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
30. 30.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
31. 31.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) turmeric powder (d) a piece of string
32. 32.🧂 Which of these dissolves in water? (a) glucose powder (b) cooking oil (c) chalk powder (d) sawdust
33. 33.True or false: rusting iron is a change that can be undone. (a) False (b) True
34. 34.🧂 Which of these dissolves in water? (a) baking soda (b) small pebbles (c) chalk powder (d) sawdust
35. 35.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
36. 36.⚖️ 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 keep it the same (b) we measure it (c) we change it
37. 37.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sea water evaporates (d) sand is ground up
38. 38.🔍 Which is the odd one out? (a) baking soda (b) chalk powder (c) sugar (d) food colour
39. 39.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) saturated (d) magnetic
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False

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