Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 476 · 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 is a change that cannot be undone? (a) dissolving salt (b) folding paper (c) melting ice (d) milk turning to curd
2. 2.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
3. 3.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny stars (d) tiny spheres
4. 4.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) yeast (c) a battery cell (d) warm water
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a spoon (c) warm water (d) a magnet
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a battery cell (c) a spoon (d) warm water
7. 7.⚖️ 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
8. 8.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a piece of string (c) yeast (d) warm water
9. 9.🔍 Which is the odd one out? (a) sugar (b) small pebbles (c) sand (d) chalk powder
10. 10.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
11. 11.True or false: melting butter is a change that cannot be undone. (a) True (b) False
12. 12.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
13. 13.🛟 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
14. 14.True or false: salt is not needed for growing salt crystals. (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.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) water evaporates (d) the dish melts
17. 17.🧂 Which of these does not dissolve in water? (a) food colour (b) glucose powder (c) sawdust (d) sugar
18. 18.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
19. 19.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the kind of salt (c) the amount of water (d) days to see crystals
21. 21.🧈 Which of these is a change that can be undone? (a) melting ice (b) cooking an egg (c) browning lemon ink (d) milk turning to curd
22. 22.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
23. 23.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) small pebbles (d) baking soda
24. 24.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
26. 26.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) salt crystals form (d) sugar crystals form
27. 27.🧈 Which of these is a change that can be undone? (a) rusting iron (b) milk turning to curd (c) browning lemon ink (d) freezing water
28. 28.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) safe from small children (d) on the edge of a table
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a battery cell (c) warm water (d) salt
30. 30.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a balloon (c) a piece of string (d) salt
31. 31.🧈 Which of these is a change that can be undone? (a) rusting iron (b) melting butter (c) milk turning to curd (d) cooking an egg
32. 32.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a battery cell (c) yeast (d) salt
33. 33.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) saturated (c) empty (d) frozen
34. 34.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
35. 35.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
36. 36.⚖️ 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 keep it the same (b) we change it (c) we measure it
37. 37.True or false: baking a cake is a change that can be undone. (a) False (b) True
38. 38.True or false: baking soda dissolves in water. (a) False (b) True
39. 39.True or false: melting ice is a change that can be undone. (a) False (b) True
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) a mirror (d) salt

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