Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 756 · 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? What do we do with “days to see crystals”? (a) we measure it (b) we keep it the same (c) we change it
2. 2.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) the dish melts (d) salt grows roots
3. 3.🔍 Which is the odd one out? (a) chalk powder (b) sawdust (c) sand (d) sugar
4. 4.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) frozen (d) magnetic
5. 5.True or false: rusting iron is a change that can be undone. (a) True (b) False
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) True (b) False
7. 7.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) yeast (c) a shallow dish (d) a spoon
9. 9.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) melting ice (c) milk turning to curd (d) rusting iron
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a magnet (c) warm water (d) a shallow dish
11. 11.True or false: sand dissolves in water. (a) True (b) False
12. 12.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) True (b) False
15. 15.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) it turns to oil (d) sugar crystals form
16. 16.⚖️ 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
17. 17.⚖️ 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 keep it the same (b) we change it (c) we measure it
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
19. 19.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) sawdust (d) sugar
21. 21.⚖️ 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 measure it (b) we keep it the same (c) we change it
22. 22.⚖️ 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 change it (b) we measure it (c) we keep it the same
23. 23.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) chalk powder (d) baking soda
24. 24.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) nobody needs to (d) the youngest child
25. 25.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) dissolving salt (c) cooking an egg (d) folding paper
26. 26.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a spoon (d) a battery cell
28. 28.🧂 Which of these dissolves in water? (a) sawdust (b) table salt (c) small pebbles (d) sand
29. 29.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
30. 30.⚖️ 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
31. 31.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) salt (c) a balloon (d) turmeric powder
32. 32.True or false: warm water is needed for growing salt crystals. (a) False (b) True
33. 33.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) rusting iron (d) melting ice
34. 34.⚖️ 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) False (b) True
35. 35.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) cooking oil (d) sugar
36. 36.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) rusting iron (d) freezing water
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) a balloon (d) a spoon
38. 38.True or false: melting ice is a change that can be undone. (a) False (b) True
39. 39.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sand is ground up (c) sea water evaporates (d) fish make it
40. 40.🔍 Which is the odd one out? (a) sand (b) cooking oil (c) sawdust (d) table salt

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