Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 943 · 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 is the odd one out? (a) chalk powder (b) sugar (c) sawdust (d) small pebbles
2. 2.⚖️ 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 keep it the same (b) we measure it (c) we change it
3. 3.⚖️ 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 change it (b) we measure it (c) we keep it the same
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we keep it the same (b) we change it (c) we measure it
5. 5.True or false: dissolving salt is a change that can be undone. (a) True (b) False
6. 6.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
7. 7.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a mirror (c) turmeric powder (d) a balloon
8. 8.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
9. 9.True or false: sawdust dissolves in water. (a) True (b) False
10. 10.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
11. 11.🔍 Which is the odd one out? (a) food colour (b) sugar (c) small pebbles (d) table salt
12. 12.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) sea water evaporates (c) fish make it (d) salt rains down
13. 13.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny cubes (d) tiny triangles
14. 14.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
15. 15.⚖️ 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
16. 16.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) freezing water (c) folding paper (d) cooking an egg
17. 17.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) bigger crystals (d) smaller crystals
18. 18.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) yeast (c) a spoon (d) salt
19. 19.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
20. 20.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
21. 21.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) turmeric powder (c) yeast (d) a magnet
22. 22.⚖️ 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) False (b) True
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a shallow dish (d) a balloon
24. 24.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) sawdust (d) food colour
25. 25.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
26. 26.⚖️ 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
27. 27.🧂 Which of these does not dissolve in water? (a) baking soda (b) sugar (c) sawdust (d) food colour
28. 28.🧂 Which of these does not dissolve in water? (a) chalk powder (b) sugar (c) baking soda (d) table salt
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a shallow dish (d) turmeric powder
30. 30.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) salt grows roots (d) water evaporates
31. 31.🧂 Which of these does not dissolve in water? (a) cooking oil (b) glucose powder (c) table salt (d) sugar
32. 32.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) glucose powder (d) small pebbles
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) a battery cell (d) a spoon
34. 34.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
35. 35.⚖️ 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 measure it (c) we change it
36. 36.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
37. 37.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
38. 38.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) chalk powder (d) table salt

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