Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 439 · 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.⚖️ 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
2. 2.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt grows roots (d) salt eats water
3. 3.True or false: food colour does not dissolve in water. (a) True (b) False
4. 4.🧈 Which of these is a change that can be undone? (a) melting butter (b) browning lemon ink (c) milk turning to curd (d) rusting iron
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) salt (d) a mirror
6. 6.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) sugar (d) cooking oil
7. 7.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny spheres (c) tiny cubes (d) tiny stars
8. 8.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) warm water (d) a magnet
9. 9.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
10. 10.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) baking a cake (d) freezing water
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) warm water (d) a balloon
12. 12.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) rusting iron (c) freezing water (d) folding paper
13. 13.True or false: salt is not needed for growing salt crystals. (a) False (b) True
14. 14.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
15. 15.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) turmeric powder (c) a mirror (d) a shallow dish
16. 16.True or false: sugar does not dissolve in water. (a) True (b) False
17. 17.⚖️ 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 change it (c) we measure it
18. 18.True or false: food colour dissolves in water. (a) False (b) True
19. 19.True or false: glucose powder does not dissolve in water. (a) False (b) True
20. 20.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) baking a cake (c) browning lemon ink (d) freezing water
21. 21.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) the youngest child (d) a grown-up
22. 22.⚖️ 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 salt (c) days to see crystals
23. 23.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
24. 24.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) bigger crystals (d) liquid crystals
25. 25.🧂 Which of these dissolves in water? (a) baking soda (b) sawdust (c) cooking oil (d) sand
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
27. 27.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
28. 28.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
29. 29.🧂 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
30. 30.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
31. 31.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
32. 32.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
33. 33.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) safe from small children (d) next to the baby
34. 34.True or false: melting butter is a change that cannot be undone. (a) True (b) False
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a piece of string (c) warm water (d) a spoon
36. 36.🌊 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
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) yeast (d) a shallow dish
38. 38.🧂 Which of these does not dissolve in water? (a) glucose powder (b) food colour (c) sand (d) baking soda
39. 39.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
40. 40.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a magnet (c) a spoon (d) turmeric powder

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