Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 927 · 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.🧂 Which of these does not dissolve in water? (a) food colour (b) baking soda (c) sugar (d) cooking oil
2. 2.⚖️ 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 change it (c) we keep it the same
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a battery cell (d) salt
4. 4.🧂 Which of these dissolves in water? (a) chalk powder (b) table salt (c) cooking oil (d) small pebbles
5. 5.⚖️ 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 change it (c) we keep it the same
6. 6.⚖️ 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 amount of water (b) the same dish (c) days to see crystals (d) the amount of salt
7. 7.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a balloon (c) salt (d) yeast
8. 8.⚖️ 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
9. 9.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) turmeric powder (c) a shallow dish (d) a balloon
10. 10.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) salt crystals form (d) it turns to oil
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) warm water (c) a piece of string (d) salt
12. 12.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) salt eats water (d) the dish melts
13. 13.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
15. 15.⚖️ 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) the same dish (c) the amount of salt (d) the kind of salt
16. 16.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) rusting iron (d) freezing water
17. 17.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
18. 18.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) melting ice (c) melting butter (d) folding paper
19. 19.🧂 Which of these does not dissolve in water? (a) food colour (b) small pebbles (c) sugar (d) table salt
20. 20.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny cubes (c) tiny stars (d) tiny triangles
21. 21.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) magnetic (c) empty (d) frozen
22. 22.True or false: baking soda does not dissolve in water. (a) False (b) True
23. 23.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) table salt (d) sand
24. 24.⚖️ 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
25. 25.🧂 Which of these dissolves in water? (a) sawdust (b) cooking oil (c) chalk powder (d) glucose powder
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a spoon (d) yeast
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) turmeric powder (d) salt
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a piece of string (d) a magnet
29. 29.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
30. 30.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
31. 31.⚖️ 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
32. 32.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) glucose powder (b) cooking oil (c) table salt (d) food colour
34. 34.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
35. 35.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
36. 36.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
37. 37.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) it turns sweet (d) crystals grow faster
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False
39. 39.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
40. 40.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a balloon (c) a piece of string (d) a magnet

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