Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 461 · 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.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
2. 2.⚖️ 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) the same dish (b) the amount of salt (c) sunny or shady place (d) the amount of water
3. 3.⚖️ 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 salt (b) sunny or shady place (c) days to see crystals (d) the amount of water
4. 4.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to oil (d) it turns to butter
5. 5.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) baking a cake (d) freezing water
6. 6.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) safe from small children (d) next to the baby
7. 7.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sand is ground up (c) sea water evaporates (d) salt rains down
8. 8.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
9. 9.🧂 Which of these dissolves in water? (a) cooking oil (b) small pebbles (c) sand (d) table salt
10. 10.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) no crystals (d) smaller crystals
11. 11.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
12. 12.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
14. 14.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
15. 15.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny triangles (c) tiny spheres (d) tiny stars
16. 16.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) a spoon (d) a battery cell
17. 17.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
18. 18.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
19. 19.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) browning lemon ink (c) rusting iron (d) melting butter
20. 20.⚖️ 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
21. 21.⚖️ 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 same dish (b) sunny or shady place (c) days to see crystals
22. 22.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
23. 23.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
24. 24.🔍 Which is the odd one out? (a) chalk powder (b) table salt (c) small pebbles (d) sand
25. 25.⚖️ 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 change it (c) we keep it the same
26. 26.True or false: rusting iron is a change that can be undone. (a) True (b) False
27. 27.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) sugar (d) chalk powder
28. 28.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) folding paper (c) melting butter (d) milk turning to curd
29. 29.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) salt (c) turmeric powder (d) a balloon
30. 30.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to make it very salty (c) to cool the water (d) to change its colour
31. 31.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
32. 32.⚖️ 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) False (b) True
33. 33.🧂 Which of these does not dissolve in water? (a) sawdust (b) sugar (c) food colour (d) baking soda
34. 34.🔍 Which is the odd one out? (a) table salt (b) glucose powder (c) chalk powder (d) food colour
35. 35.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) salt (c) a spoon (d) warm water
36. 36.⚖️ 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
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) a spoon (c) a piece of string (d) salt
38. 38.🔍 Which is the odd one out? (a) sugar (b) cooking oil (c) baking soda (d) table salt
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) True (b) False
40. 40.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve

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