Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 111 · 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.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
2. 2.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a magnet (c) turmeric powder (d) a mirror
3. 3.⚖️ 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
4. 4.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it turns sweet (d) it fizzes
5. 5.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a balloon (c) yeast (d) a spoon
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a spoon (d) a mirror
7. 7.🔍 Which is the odd one out? (a) food colour (b) chalk powder (c) sugar (d) baking soda
8. 8.⚖️ 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 kind of salt (b) the amount of salt (c) days to see crystals (d) the same dish
9. 9.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a spoon (c) salt (d) a balloon
10. 10.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sea water evaporates (d) sand is ground up
11. 11.⚖️ 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) False (b) True
12. 12.True or false: warm water is needed for growing salt crystals. (a) False (b) True
13. 13.True or false: folding paper is a change that cannot be undone. (a) True (b) False
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 keep it the same (c) we change it
15. 15.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
16. 16.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) baking soda (d) small pebbles
17. 17.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
18. 18.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
19. 19.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) turmeric powder (c) a shallow dish (d) salt
20. 20.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) milk turning to curd (d) melting butter
21. 21.True or false: food colour dissolves in water. (a) False (b) True
22. 22.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) water evaporates (d) salt grows roots
23. 23.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
24. 24.⚖️ 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
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a piece of string (d) a balloon
26. 26.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) liquid crystals (d) no crystals
27. 27.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny triangles (d) tiny cubes
28. 28.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
29. 29.⚖️ 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 measure it (b) we change it (c) we keep it the same
30. 30.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
31. 31.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a friend who is running (d) a grown-up
32. 32.True or false: sugar dissolves in water. (a) False (b) True
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a magnet (c) a piece of string (d) a shallow dish
34. 34.🧂 Which of these dissolves in water? (a) chalk powder (b) small pebbles (c) sand (d) table salt
35. 35.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
36. 36.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
37. 37.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it very salty (c) to make it fizz (d) to change its colour
38. 38.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
39. 39.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a spoon (c) yeast (d) warm water

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