Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 716 · 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) warm water (b) a spoon (c) a shallow dish (d) a battery cell
2. 2.⚖️ 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) True (b) False
3. 3.True or false: melting butter is a change that can be undone. (a) False (b) True
4. 4.True or false: yeast is needed for growing salt crystals. (a) True (b) False
5. 5.True or false: table salt does not dissolve in water. (a) True (b) False
6. 6.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
7. 7.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny cubes (d) tiny triangles
8. 8.True or false: food colour does not dissolve in water. (a) True (b) False
9. 9.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it fizz (c) to cool the water (d) to make it very salty
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) False (b) True
11. 11.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a magnet (c) warm water (d) a shallow dish
13. 13.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a magnet (c) a piece of string (d) salt
14. 14.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
15. 15.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) browning lemon ink (d) dissolving salt
16. 16.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) cooking oil (d) food colour
17. 17.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
18. 18.True or false: melting butter is a change that cannot be undone. (a) True (b) False
19. 19.True or false: sugar does not dissolve in water. (a) False (b) True
20. 20.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) True (b) False
22. 22.True or false: rusting iron is a change that can be undone. (a) False (b) True
23. 23.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a balloon (c) a shallow dish (d) a mirror
24. 24.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) melting butter (d) baking a cake
25. 25.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.⚖️ 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 change it (b) we keep it the same (c) we measure it
27. 27.⚖️ 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 measure it (b) we keep it the same (c) we change it
28. 28.⚖️ 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 keep it the same (c) we change it
29. 29.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
30. 30.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
31. 31.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
32. 32.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) frozen (d) saturated
33. 33.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) melting ice (c) cooking an egg (d) rusting iron
34. 34.⚖️ 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
35. 35.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a balloon (c) yeast (d) warm water
36. 36.⚖️ 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) sunny or shady place (b) days to see crystals (c) the amount of water (d) the amount of salt
37. 37.⚖️ 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) the amount of water (c) sunny or shady place
38. 38.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) smaller crystals (d) liquid crystals
39. 39.🔍 Which is the odd one out? (a) sawdust (b) sand (c) food colour (d) cooking oil
40. 40.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True

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