Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 792 · 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: sugar does not dissolve in water. (a) False (b) True
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) False (b) True
3. 3.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a spoon (c) a magnet (d) a battery cell
4. 4.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
5. 5.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a shallow dish (c) a balloon (d) a magnet
6. 6.True or false: baking soda dissolves in water. (a) False (b) True
7. 7.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) in a busy doorway (d) safe from small children
8. 8.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
9. 9.🧂 Does cooking oil 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? What do we do with “sunny or shady place”? (a) we keep it the same (b) we measure it (c) we change it
11. 11.🧂 Which of these dissolves in water? (a) table salt (b) chalk powder (c) cooking oil (d) sand
12. 12.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the amount of salt (b) sunny or shady place (c) days to see crystals
14. 14.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
15. 15.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) sand (d) food colour
16. 16.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) no crystals (d) bigger crystals
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a piece of string (c) a shallow dish (d) salt
18. 18.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) fish make it (c) salt rains down (d) sea water evaporates
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a magnet (d) salt
20. 20.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) yeast (d) a spoon
21. 21.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a piece of string (c) a magnet (d) a mirror
22. 22.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
23. 23.True or false: folding paper is a change that cannot be undone. (a) True (b) False
24. 24.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny stars (d) tiny triangles
25. 25.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
26. 26.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) crystals grow faster (d) it fizzes
27. 27.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) warm water (c) a magnet (d) a battery cell
28. 28.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
29. 29.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) small pebbles (d) sugar
30. 30.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
31. 31.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) sawdust (d) sugar
32. 32.🧈 Which of these is a change that can be undone? (a) baking a cake (b) browning lemon ink (c) cooking an egg (d) melting butter
33. 33.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
34. 34.⚖️ 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
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) salt (d) a mirror
36. 36.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it very salty (d) to make it fizz
39. 39.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
40. 40.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False

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