Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 609 · 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: baking a cake? (a) cannot be undone (b) can be undone
2. 2.🧂 Which of these does not dissolve in water? (a) food colour (b) cooking oil (c) glucose powder (d) table salt
3. 3.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
4. 4.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) in a busy doorway (d) on the edge of a table
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the kind of salt
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) salt (d) turmeric powder
7. 7.⚖️ 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 keep it the same (b) we change it (c) we measure it
8. 8.True or false: baking soda dissolves in water. (a) True (b) False
9. 9.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
10. 10.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a shallow dish (d) a mirror
12. 12.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) cooking an egg (c) melting ice (d) melting butter
13. 13.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) smaller crystals (d) liquid crystals
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) the amount of water (b) days to see crystals (c) the same dish (d) sunny or shady place
15. 15.🧂 Which of these does not dissolve in water? (a) small pebbles (b) baking soda (c) sugar (d) table salt
16. 16.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
17. 17.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
18. 18.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) a magnet (d) a shallow dish
19. 19.⚖️ 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) True (b) False
20. 20.True or false: table salt dissolves in water. (a) True (b) False
21. 21.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) it turns to butter (d) salt crystals form
22. 22.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
23. 23.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
24. 24.True or false: cooking oil does not dissolve in water. (a) False (b) True
25. 25.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) crystals grow faster (d) few or no crystals
26. 26.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
27. 27.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
28. 28.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a mirror (c) a piece of string (d) warm water
29. 29.True or false: melting ice is a change that cannot be undone. (a) False (b) True
30. 30.⚖️ 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
31. 31.True or false: sugar does not dissolve in water. (a) True (b) False
32. 32.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
33. 33.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) salt (c) a magnet (d) a mirror
34. 34.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny spheres (c) tiny cubes (d) tiny stars
35. 35.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) fish make it (c) sand is ground up (d) salt rains down
36. 36.⚖️ 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 measure it (c) we keep it the same
37. 37.🧂 Which of these dissolves in water? (a) sand (b) baking soda (c) cooking oil (d) sawdust
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) sunny or shady place (c) the kind of salt (d) the amount of water
39. 39.🧈 Which of these is a change that can be undone? (a) rusting iron (b) dissolving salt (c) browning lemon ink (d) cooking an egg
40. 40.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water

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