Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 494 · 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.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
2. 2.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
3. 3.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
4. 4.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
5. 5.🔍 Which is the odd one out? (a) small pebbles (b) sawdust (c) sugar (d) sand
6. 6.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a shallow dish (c) salt (d) warm water
8. 8.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) water evaporates (d) salt grows roots
9. 9.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
10. 10.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) a piece of string (c) a shallow dish (d) a spoon
11. 11.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
12. 12.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
13. 13.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
14. 14.🔍 Which is the odd one out? (a) food colour (b) sand (c) chalk powder (d) small pebbles
15. 15.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) saturated (d) frozen
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) False (b) True
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) salt (d) a battery cell
18. 18.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
19. 19.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sea water evaporates (c) salt rains down (d) sand is ground up
20. 20.🧂 Which of these dissolves in water? (a) sugar (b) sawdust (c) chalk powder (d) small pebbles
21. 21.🔮 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
22. 22.⚖️ 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 same dish
23. 23.⚖️ 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
24. 24.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) a shallow dish (d) a balloon
26. 26.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
27. 27.⚖️ 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
28. 28.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) warm water (c) yeast (d) turmeric powder
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a shallow dish (c) a spoon (d) a piece of string
30. 30.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) a piece of string (c) salt (d) warm water
31. 31.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting butter (c) folding paper (d) baking a cake
32. 32.⚖️ 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 keep it the same (b) we measure it (c) we change it
33. 33.True or false: folding paper is a change that cannot be undone. (a) True (b) False
34. 34.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) a piece of string (c) warm water (d) salt
35. 35.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
36. 36.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) melting butter (c) rusting iron (d) cooking an egg
37. 37.True or false: table salt does not dissolve in water. (a) False (b) True
38. 38.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) smaller crystals (d) no crystals
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) yeast (d) salt
40. 40.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve

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