Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 619 · 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) frozen (b) saturated (c) magnetic (d) empty
2. 2.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) the youngest child (d) a grown-up
3. 3.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
4. 4.🧂 Which of these does not dissolve in water? (a) sugar (b) sawdust (c) table salt (d) baking soda
5. 5.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
6. 6.🌊 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
7. 7.True or false: cooking oil dissolves in water. (a) False (b) True
8. 8.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) yeast (c) a battery cell (d) a mirror
9. 9.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
10. 10.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) salt crystals form (d) it turns to oil
11. 11.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny cubes (d) tiny spheres
12. 12.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it fizzes (d) it turns sweet
13. 13.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) yeast (d) a shallow dish
14. 14.⚖️ 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) sunny or shady place (b) days to see crystals (c) the same dish (d) the kind of salt
15. 15.⚖️ 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
16. 16.⚖️ 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 keep it the same (c) we measure it
17. 17.True or false: melting butter is a change that can be undone. (a) False (b) True
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) True (b) False
19. 19.True or false: glucose powder does not dissolve in water. (a) False (b) True
20. 20.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
22. 22.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) a spoon (c) a shallow dish (d) salt
23. 23.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) next to the baby (d) in a busy doorway
24. 24.⚖️ 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 amount of salt (c) days to see crystals (d) sunny or shady place
25. 25.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a battery cell (d) a piece of string
27. 27.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
28. 28.🔍 Which is the odd one out? (a) sawdust (b) cooking oil (c) food colour (d) small pebbles
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a piece of string (c) a battery cell (d) a shallow dish
30. 30.⚖️ 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 measure it (b) we keep it the same (c) we change it
31. 31.True or false: rusting iron is a change that can be undone. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) chalk powder (d) table salt
33. 33.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
34. 34.⚖️ 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 change it (c) we keep it the same
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a piece of string (d) a magnet
36. 36.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
37. 37.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
38. 38.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
39. 39.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
40. 40.True or false: melting butter is a change that cannot be undone. (a) True (b) False

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