Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 945 · 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.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a piece of string (c) a magnet (d) a mirror
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) warm water (d) turmeric powder
3. 3.🛟 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
4. 4.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it fizz (d) to make it very salty
5. 5.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
6. 6.True or false: freezing water is a change that cannot be undone. (a) False (b) True
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a shallow dish (d) yeast
9. 9.True or false: baking a cake is a change that can be undone. (a) True (b) False
10. 10.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) frozen (d) saturated
11. 11.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a piece of string (c) a shallow dish (d) salt
13. 13.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) smaller crystals (d) no crystals
14. 14.🧺 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 balloon
15. 15.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
16. 16.⚖️ 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 change it (b) we measure it (c) we keep it the same
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) a spoon (c) salt (d) a shallow dish
18. 18.⚖️ 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) False (b) True
19. 19.⚖️ 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
20. 20.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny triangles (c) tiny stars (d) tiny spheres
21. 21.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) dissolving salt (c) melting ice (d) melting butter
22. 22.True or false: melting ice is a change that cannot be undone. (a) False (b) True
23. 23.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) few or no crystals (d) crystals grow faster
24. 24.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
25. 25.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
26. 26.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
27. 27.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
28. 28.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a battery cell (c) a shallow dish (d) a spoon
32. 32.True or false: baking soda dissolves in water. (a) True (b) False
33. 33.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) yeast (c) a spoon (d) a balloon
34. 34.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) sugar (d) chalk powder
35. 35.True or false: salt is not needed for growing salt crystals. (a) True (b) False
36. 36.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
37. 37.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) warm water (c) yeast (d) a magnet
38. 38.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
39. 39.⚖️ 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 keep it the same (c) we change it
40. 40.⚖️ 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

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