Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 48 · 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) salt (b) warm water (c) a mirror (d) a spoon
2. 2.⚖️ 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
3. 3.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
4. 4.🧂 Which of these does not dissolve in water? (a) baking soda (b) food colour (c) sawdust (d) table salt
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of salt (b) the kind of salt (c) days to see crystals (d) the same dish
6. 6.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) cooking an egg (c) melting ice (d) folding paper
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 water”? (a) we keep it the same (b) we measure it (c) we change it
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) salt (d) a battery cell
9. 9.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
10. 10.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) smaller crystals (d) liquid crystals
11. 11.True or false: sugar does not dissolve in water. (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 the one thing we change? (a) sunny or shady place (b) the kind of salt (c) days to see crystals (d) the amount of water
13. 13.🧂 Which of these dissolves in water? (a) table salt (b) sawdust (c) chalk powder (d) sand
14. 14.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
15. 15.⚖️ 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
16. 16.True or false: sawdust does not dissolve in water. (a) False (b) True
17. 17.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a balloon (c) turmeric powder (d) a piece of string
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) salt (d) a balloon
19. 19.True or false: cooking oil dissolves in water. (a) True (b) False
20. 20.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
21. 21.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) salt (c) a piece of string (d) a shallow dish
22. 22.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) on the edge of a table (d) next to the baby
23. 23.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny spheres (d) tiny cubes
24. 24.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
25. 25.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
26. 26.True or false: melting butter is a change that cannot be undone. (a) True (b) False
27. 27.⚖️ 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
28. 28.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) sugar (d) cooking oil
29. 29.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
30. 30.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) salt eats water (d) the dish melts
31. 31.🌊 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
32. 32.🧂 Which of these does not dissolve in water? (a) table salt (b) food colour (c) cooking oil (d) sugar
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a shallow dish (d) a magnet
34. 34.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it fizz (c) to make it very salty (d) to change its colour
35. 35.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a mirror (c) yeast (d) a spoon
36. 36.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
37. 37.⚖️ 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
38. 38.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) turmeric powder (c) a shallow dish (d) a spoon

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