Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 184 · 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 spoon (b) a piece of string (c) yeast (d) a shallow dish
2. 2.⚖️ 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 keep it the same (b) we measure it (c) we change it
3. 3.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
4. 4.True or false: baking soda does not dissolve in water. (a) False (b) True
5. 5.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny stars (d) tiny spheres
6. 6.⚖️ 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) the same dish (b) the amount of salt (c) the amount of water (d) sunny or shady place
7. 7.True or false: melting ice is a change that can be undone. (a) False (b) True
8. 8.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) the dish melts (d) water evaporates
9. 9.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
10. 10.⚖️ 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
11. 11.True or false: salt is needed for growing salt crystals. (a) True (b) False
12. 12.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
13. 13.⚖️ 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
14. 14.⚖️ 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 measure it (b) we change it (c) we keep it the same
15. 15.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) a piece of string (c) salt (d) warm water
16. 16.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) sugar (d) small pebbles
17. 17.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) frozen (d) saturated
18. 18.⚖️ 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
19. 19.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
20. 20.🛟 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
21. 21.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
22. 22.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
23. 23.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
24. 24.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
25. 25.🧂 Which of these does not dissolve in water? (a) glucose powder (b) table salt (c) food colour (d) sawdust
26. 26.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) sugar (d) sand
27. 27.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
28. 28.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.🛟 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
30. 30.True or false: sugar does not dissolve in water. (a) True (b) False
31. 31.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
32. 32.⚖️ 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
33. 33.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a battery cell (c) a balloon (d) a magnet
34. 34.⚖️ 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
35. 35.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a piece of string (c) turmeric powder (d) a shallow dish
36. 36.True or false: baking a cake is a change that can be undone. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) table salt (b) food colour (c) glucose powder (d) chalk powder
38. 38.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
39. 39.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) bigger crystals (d) smaller crystals
40. 40.True or false: a magnet is needed for growing salt crystals. (a) False (b) True

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