Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 90 · 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.True or false: glucose powder does not dissolve in water. (a) True (b) False
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) warm water (c) a piece of string (d) salt
3. 3.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny triangles (d) tiny spheres
4. 4.True or false: folding paper is a change that cannot be undone. (a) False (b) True
5. 5.True or false: food colour does not dissolve in water. (a) True (b) False
6. 6.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) magnetic (c) frozen (d) empty
8. 8.🛟 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
9. 9.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) a balloon (d) warm water
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
11. 11.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to oil (c) salt crystals form (d) it turns to butter
12. 12.⚖️ 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 change it (b) we measure it (c) we keep it the same
13. 13.⚖️ 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
14. 14.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
15. 15.🌊 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
16. 16.⚖️ 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) days to see crystals (b) the amount of salt (c) the same dish (d) sunny or shady place
17. 17.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) rusting iron (c) milk turning to curd (d) melting butter
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) a balloon (d) salt
19. 19.True or false: rusting iron is a change that can be undone. (a) True (b) False
20. 20.🧂 Does food colour 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: sunny or shady place is what we measure. (a) False (b) True
22. 22.True or false: sugar does not dissolve in water. (a) False (b) True
23. 23.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
24. 24.🔍 Which is the odd one out? (a) sand (b) baking soda (c) sugar (d) table salt
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) a piece of string (c) a shallow dish (d) salt
26. 26.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
27. 27.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a mirror (c) a spoon (d) a piece of string
29. 29.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) the dish melts (c) salt eats water (d) salt grows roots
30. 30.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
31. 31.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
32. 32.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
33. 33.🧈 Which of these is a change that can be undone? (a) baking a cake (b) milk turning to curd (c) melting ice (d) browning lemon ink
34. 34.🔍 Which is the odd one out? (a) small pebbles (b) sugar (c) cooking oil (d) sawdust
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the amount of salt (b) sunny or shady place (c) days to see crystals
36. 36.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
38. 38.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
39. 39.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
40. 40.True or false: cooking oil dissolves in water. (a) False (b) True

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