Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 452 · 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: melting ice is a change that cannot be undone. (a) False (b) True
2. 2.⚖️ 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
3. 3.⚖️ 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
4. 4.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
5. 5.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
6. 6.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) crystals grow faster (d) it fizzes
7. 7.⚖️ 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) the same dish (c) the kind of salt (d) sunny or shady place
8. 8.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) no crystals (d) smaller crystals
9. 9.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) on the edge of a table (d) in a busy doorway
10. 10.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
11. 11.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sea water evaporates (c) sand is ground up (d) salt rains down
12. 12.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
13. 13.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
14. 14.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
15. 15.⚖️ 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
16. 16.True or false: baking soda does not dissolve in water. (a) True (b) False
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) warm water (d) a battery cell
18. 18.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
19. 19.🧈 Which of these is a change that can be undone? (a) baking a cake (b) folding paper (c) browning lemon ink (d) cooking an egg
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a spoon (d) a magnet
21. 21.True or false: folding paper is a change that cannot be undone. (a) True (b) False
22. 22.⚖️ 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 measure it (b) we change it (c) we keep it the same
23. 23.True or false: sugar dissolves in water. (a) True (b) False
24. 24.⚖️ 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) True (b) False
25. 25.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) food colour (d) sawdust
26. 26.⚖️ 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) True (b) False
27. 27.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) table salt (d) small pebbles
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
29. 29.🧺 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
30. 30.⚖️ 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 change it (b) we measure it (c) we keep it the same
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) True (b) False
32. 32.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) browning lemon ink (d) melting ice
33. 33.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
34. 34.True or false: cooking oil does not dissolve in water. (a) False (b) True
35. 35.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
36. 36.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a spoon (c) yeast (d) a piece of string
38. 38.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) salt crystals form (d) sugar crystals form
39. 39.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
40. 40.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water

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