Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 438 · 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.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
3. 3.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) sugar crystals form (d) it turns to oil
4. 4.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
5. 5.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) smaller crystals (d) liquid crystals
6. 6.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a magnet (c) a mirror (d) warm water
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
8. 8.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) saturated (c) frozen (d) empty
9. 9.🧂 Which of these does not dissolve in water? (a) sugar (b) table salt (c) baking soda (d) sawdust
10. 10.⚖️ 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 measure it (b) we keep it the same (c) we change it
11. 11.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
12. 12.⚖️ 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) the amount of water (c) days to see crystals
13. 13.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
14. 14.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) fish make it (d) sand is ground up
15. 15.🧈 Which of these is a change that can be undone? (a) folding paper (b) milk turning to curd (c) cooking an egg (d) browning lemon ink
16. 16.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) a mirror (d) a piece of string
17. 17.⚖️ 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
18. 18.🔍 Which is the odd one out? (a) chalk powder (b) food colour (c) cooking oil (d) small pebbles
19. 19.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) in a busy doorway (d) next to the baby
20. 20.True or false: melting butter 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? What do we do with “days to see crystals”? (a) we keep it the same (b) we measure it (c) we change it
22. 22.🧂 Which of these does not dissolve in water? (a) cooking oil (b) table salt (c) baking soda (d) sugar
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we change it (b) we keep it the same (c) we measure it
24. 24.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
25. 25.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to cool the water (d) to make it fizz
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a mirror (d) salt
27. 27.⚖️ 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 measure it (b) we change it (c) we keep it the same
28. 28.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a piece of string (d) a battery cell
30. 30.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) yeast (c) a spoon (d) a balloon
31. 31.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) table salt (d) sand
32. 32.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
34. 34.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny triangles (c) tiny stars (d) tiny spheres
35. 35.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
36. 36.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
37. 37.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
38. 38.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) food colour (d) small pebbles
40. 40.🔍 Which is the odd one out? (a) baking soda (b) table salt (c) small pebbles (d) food colour

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