Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 118 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a mirror (d) a piece of string
2. 2.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a battery cell (c) a shallow dish (d) warm water
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a balloon (c) salt (d) warm water
5. 5.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) sugar crystals form (d) it turns to oil
6. 6.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
7. 7.⚖️ 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
8. 8.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
9. 9.🧈 Which of these is a change that can be undone? (a) baking a cake (b) melting ice (c) rusting iron (d) cooking an egg
10. 10.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) browning lemon ink (c) rusting iron (d) milk turning to curd
11. 11.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
12. 12.⚖️ 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
13. 13.True or false: small pebbles dissolves in water. (a) False (b) True
14. 14.⚖️ 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 change it (b) we keep it the same (c) we measure it
15. 15.True or false: cooking an egg is a change that can be undone. (a) True (b) False
16. 16.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
17. 17.⚖️ 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 change it (b) we keep it the same (c) we measure it
18. 18.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the kind of salt
20. 20.True or false: folding paper is a change that cannot be undone. (a) True (b) False
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False
22. 22.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) magnetic (d) frozen
23. 23.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
24. 24.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) on the edge of a table (d) safe from small children
25. 25.True or false: table salt does not dissolve in water. (a) True (b) False
26. 26.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it very salty (d) to make it fizz
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) salt (d) a magnet
28. 28.True or false: sawdust does not dissolve in water. (a) True (b) False
29. 29.🔍 Which is the odd one out? (a) table salt (b) chalk powder (c) baking soda (d) sugar
30. 30.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
31. 31.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
32. 32.🧺 Do we need turmeric powder 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) rusting iron (d) folding paper
34. 34.⚖️ 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 keep it the same (b) we change it (c) we measure it
35. 35.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny spheres (d) tiny stars
36. 36.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sand is ground up (c) fish make it (d) sea water evaporates
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a spoon (d) turmeric powder
38. 38.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
39. 39.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) cooking an egg (d) freezing water
40. 40.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True

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