Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 398 · 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 do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) frozen (d) magnetic
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) True (b) False
3. 3.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) freezing water (c) folding paper (d) cooking an egg
4. 4.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) chalk powder (d) glucose powder
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) salt (c) warm water (d) a piece of string
6. 6.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) chalk powder (d) baking soda
7. 7.🧂 Which of these does not dissolve in water? (a) cooking oil (b) table salt (c) glucose powder (d) food colour
8. 8.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) liquid crystals (d) bigger crystals
9. 9.⚖️ 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 change it (c) we keep it the same
10. 10.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
11. 11.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny cubes (d) tiny triangles
12. 12.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) a friend who is running (d) nobody needs to
13. 13.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) fish make it (d) sea water evaporates
14. 14.⚖️ 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
15. 15.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting butter (c) browning lemon ink (d) freezing water
16. 16.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) yeast (c) a piece of string (d) salt
18. 18.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) baking a cake (d) freezing water
19. 19.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
20. 20.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a magnet (d) a shallow dish
21. 21.⚖️ 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 same dish (c) sunny or shady place
22. 22.🛟 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
23. 23.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) water evaporates (d) the dish melts
24. 24.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
25. 25.⚖️ 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) False (b) True
26. 26.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
27. 27.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
28. 28.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it very salty (c) to make it fizz (d) to change its colour
29. 29.True or false: food colour dissolves in water. (a) False (b) True
30. 30.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
31. 31.True or false: sugar does not dissolve in water. (a) False (b) True
32. 32.True or false: glucose powder dissolves in water. (a) True (b) False
33. 33.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
34. 34.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
35. 35.⚖️ 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) days to see crystals (b) the amount of water (c) the amount of salt (d) sunny or shady place
36. 36.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) crystals grow faster (d) it turns sweet
37. 37.⚖️ 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
38. 38.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) table salt (d) small pebbles
39. 39.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
40. 40.True or false: a spoon is needed for growing salt crystals. (a) True (b) False

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