Salt Crystal Experiment Worksheet

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

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