Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 519 · 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.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
2. 2.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny triangles (d) tiny stars
3. 3.⚖️ 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
4. 4.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
5. 5.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) turmeric powder (c) a balloon (d) a battery cell
6. 6.⚖️ 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
7. 7.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) empty (d) saturated
8. 8.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to change its colour (d) to cool the water
9. 9.🧂 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) sand (d) baking soda
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 keep it the same (b) we measure it (c) we change it
11. 11.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
12. 12.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
13. 13.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) glucose powder (d) cooking oil
14. 14.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) turmeric powder (c) warm water (d) a shallow dish
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) turmeric powder (c) salt (d) a piece of string
16. 16.True or false: melting butter is a change that cannot be undone. (a) True (b) False
17. 17.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) the youngest child (d) a grown-up
18. 18.⚖️ 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 same dish (b) the amount of salt (c) days to see crystals (d) the amount of water
19. 19.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) glucose powder (d) sand
20. 20.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
21. 21.🔍 Which is the odd one out? (a) baking soda (b) sand (c) glucose powder (d) sugar
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a shallow dish (c) a spoon (d) salt
23. 23.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
24. 24.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) True (b) False
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) True (b) False
27. 27.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) in a busy doorway (d) on the edge of a table
28. 28.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) it turns sweet (d) crystals grow faster
29. 29.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) water evaporates (d) salt grows roots
30. 30.⚖️ 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
31. 31.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) warm water (c) turmeric powder (d) a mirror
32. 32.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) browning lemon ink (c) baking a cake (d) melting ice
33. 33.⚖️ 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) True (b) False
34. 34.🧂 Which of these does not dissolve in water? (a) sugar (b) small pebbles (c) baking soda (d) glucose powder
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) a piece of string (d) a magnet
36. 36.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
37. 37.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) bigger crystals (d) liquid crystals
38. 38.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) cooking oil (b) sugar (c) sand (d) chalk powder
40. 40.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) baking a cake (d) melting butter

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