Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 144 · 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.⚖️ 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) False (b) True
2. 2.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
3. 3.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) the youngest child (d) a grown-up
4. 4.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
5. 5.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) no crystals (d) bigger crystals
6. 6.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
7. 7.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) salt grows roots (d) water evaporates
8. 8.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to oil (d) it turns to butter
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 change it (b) we measure it (c) we keep it the same
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 water”? (a) we measure it (b) we keep it the same (c) we change it
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a mirror (c) warm water (d) a spoon
12. 12.🧂 Which of these dissolves in water? (a) food colour (b) small pebbles (c) sand (d) cooking oil
13. 13.⚖️ 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
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a shallow dish (d) a balloon
15. 15.⚖️ 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 measure it (c) we change it
16. 16.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) salt (d) a mirror
18. 18.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the kind of salt
20. 20.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a spoon (c) salt (d) a battery cell
21. 21.🧈 Which of these is a change that can be undone? (a) baking a cake (b) melting butter (c) rusting iron (d) browning lemon ink
22. 22.⚖️ 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 keep it the same (c) we change it
23. 23.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) sugar (d) chalk powder
24. 24.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
25. 25.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) safe from small children (d) next to the baby
26. 26.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) sugar (b) table salt (c) baking soda (d) sawdust
28. 28.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it turns sweet (d) it fizzes
29. 29.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) saturated (c) empty (d) magnetic
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) warm water (c) a piece of string (d) a shallow dish
31. 31.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) yeast (c) a magnet (d) a shallow dish
32. 32.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) salt rains down (c) sand is ground up (d) fish make it
33. 33.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
34. 34.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
35. 35.⚖️ 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) sunny or shady place (c) the amount of salt (d) days to see crystals
36. 36.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
37. 37.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
38. 38.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a battery cell (c) a piece of string (d) a magnet
39. 39.🧂 Which of these does not dissolve in water? (a) sugar (b) table salt (c) chalk powder (d) baking soda
40. 40.True or false: rusting iron is a change that can be undone. (a) True (b) False

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