Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 885 · 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 shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny cubes (c) tiny spheres (d) tiny triangles
2. 2.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) salt grows roots (d) the dish melts
3. 3.⚖️ 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 change it (c) we measure it
4. 4.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
5. 5.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a magnet (c) a balloon (d) a mirror
6. 6.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) milk turning to curd (c) dissolving salt (d) melting ice
7. 7.⚖️ 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) True (b) False
8. 8.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
9. 9.True or false: melting ice is a change that can be undone. (a) False (b) True
10. 10.⚖️ 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 measure it (b) we change it (c) we keep it the same
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the kind of salt (c) days to see crystals (d) the amount of water
12. 12.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
13. 13.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) magnetic (d) saturated
14. 14.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
15. 15.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) folding paper (c) freezing water (d) melting butter
16. 16.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) dissolving salt (c) melting butter (d) freezing water
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a shallow dish (c) a spoon (d) warm water
18. 18.True or false: baking a cake is a change that can be undone. (a) True (b) False
19. 19.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) safe from small children (d) on the edge of a table
20. 20.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
21. 21.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) baking soda (d) small pebbles
23. 23.True or false: glucose powder does not dissolve in water. (a) True (b) False
24. 24.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
25. 25.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
26. 26.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) fish make it (d) sand is ground up
27. 27.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
28. 28.⚖️ 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
29. 29.🔍 Which is the odd one out? (a) chalk powder (b) cooking oil (c) small pebbles (d) sugar
30. 30.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) crystals grow faster (d) few or no crystals
31. 31.True or false: yeast is needed for growing salt crystals. (a) True (b) False
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) yeast (c) a shallow dish (d) salt
33. 33.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) turmeric powder (c) a piece of string (d) salt
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
36. 36.True or false: chalk powder does not dissolve in water. (a) False (b) True
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) True (b) False
38. 38.True or false: sand dissolves in water. (a) False (b) True
39. 39.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it fizz (d) to make it very salty
40. 40.⚖️ 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) False (b) True

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