Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 616 · 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: small pebbles dissolves in water. (a) True (b) False
2. 2.🧂 Which of these dissolves in water? (a) small pebbles (b) sand (c) cooking oil (d) glucose powder
3. 3.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a mirror (c) salt (d) a shallow dish
4. 4.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) turmeric powder (c) a balloon (d) salt
5. 5.⚖️ 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
6. 6.True or false: folding paper is a change that can be undone. (a) True (b) False
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) yeast (c) salt (d) warm water
8. 8.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to make it fizz (d) to cool the water
9. 9.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) glucose powder (d) chalk powder
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
11. 11.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
12. 12.True or false: melting butter is a change that can be undone. (a) True (b) False
13. 13.⚖️ 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) True (b) False
14. 14.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
15. 15.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
16. 16.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) warm water (d) a mirror
17. 17.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
18. 18.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
19. 19.⚖️ 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 kind of salt (b) days to see crystals (c) sunny or shady place (d) the amount of salt
20. 20.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) fish make it (c) sand is ground up (d) salt rains down
21. 21.⚖️ 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 change it (b) we keep it the same (c) we measure it
22. 22.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) smaller crystals (d) no crystals
23. 23.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
24. 24.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) a shallow dish (c) a piece of string (d) salt
25. 25.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it fizzes (c) it turns sweet (d) crystals grow faster
26. 26.True or false: cooking oil dissolves in water. (a) True (b) False
27. 27.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) frozen (d) saturated
28. 28.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
29. 29.True or false: baking soda does not dissolve in water. (a) True (b) False
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) turmeric powder (d) a piece of string
31. 31.True or false: food colour does not dissolve in water. (a) False (b) True
32. 32.True or false: sugar does not dissolve in water. (a) True (b) False
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we measure it (b) we change it (c) we keep it the same
34. 34.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a magnet (c) turmeric powder (d) a battery cell
35. 35.True or false: freezing water is a change that can be undone. (a) True (b) False
36. 36.⚖️ 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
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) a spoon (d) a balloon
38. 38.⚖️ 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 measure it (b) we keep it the same (c) we change it
39. 39.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) a grown-up (d) nobody needs to
40. 40.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone

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