Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 293 · 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.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
2. 2.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny spheres (c) tiny stars (d) tiny cubes
3. 3.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) water evaporates (d) the dish melts
4. 4.🧂 Which of these does not dissolve in water? (a) chalk powder (b) table salt (c) food colour (d) baking soda
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) a magnet (d) a spoon
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) warm water (d) a battery cell
7. 7.🔍 Which is the odd one out? (a) sand (b) sugar (c) cooking oil (d) small pebbles
8. 8.True or false: glucose powder dissolves in water. (a) True (b) False
9. 9.⚖️ 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 change it (c) we measure it
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) warm water (d) a magnet
11. 11.🔍 Which is the odd one out? (a) cooking oil (b) sawdust (c) sand (d) glucose powder
12. 12.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) cooking an egg (c) freezing water (d) folding paper
13. 13.🧂 Which of these dissolves in water? (a) cooking oil (b) sand (c) small pebbles (d) glucose powder
14. 14.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
15. 15.🌊 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
16. 16.⚖️ 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 measure it (b) we change it (c) we keep it the same
17. 17.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
18. 18.⚖️ 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
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a piece of string (c) a spoon (d) warm water
20. 20.True or false: rusting iron is a change that can be undone. (a) False (b) True
21. 21.True or false: food colour dissolves in water. (a) False (b) True
22. 22.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) yeast (d) warm water
23. 23.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
24. 24.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) it turns to oil (d) salt crystals form
25. 25.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
26. 26.⚖️ 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) True (b) False
27. 27.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) nobody needs to (d) the youngest child
28. 28.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a mirror (c) a magnet (d) salt
29. 29.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) turmeric powder (c) a magnet (d) yeast
30. 30.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
31. 31.🧺 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
32. 32.🔍 Which is the odd one out? (a) sugar (b) sawdust (c) food colour (d) table salt
33. 33.🧈 Which of these is a change that can be undone? (a) folding paper (b) cooking an egg (c) browning lemon ink (d) baking a cake
34. 34.⚖️ 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) sunny or shady place (c) the amount of salt
35. 35.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) few or no crystals (d) crystals grow faster
36. 36.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) in a busy doorway (d) next to the baby
37. 37.⚖️ 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 measure it (b) we keep it the same (c) we change it
38. 38.True or false: sand does not dissolve in water. (a) False (b) True
39. 39.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) milk turning to curd (c) melting butter (d) freezing water
40. 40.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) liquid crystals (d) smaller crystals

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