Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 525 · 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.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
2. 2.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
3. 3.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) it turns to butter (d) sugar crystals form
4. 4.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a balloon (c) warm water (d) a shallow dish
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
7. 7.⚖️ 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 change it (b) we measure it (c) we keep it the same
8. 8.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) glucose powder (d) cooking oil
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) salt (c) warm water (d) a piece of string
10. 10.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) salt (c) warm water (d) a piece of string
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a shallow dish (c) a spoon (d) warm water
12. 12.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) folding paper (c) melting ice (d) milk turning to curd
13. 13.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a battery cell (c) turmeric powder (d) warm water
14. 14.⚖️ 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 same dish (b) the kind of salt (c) the amount of water (d) days to see crystals
15. 15.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) nobody needs to (d) the youngest child
16. 16.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
17. 17.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) on the edge of a table (d) in a busy doorway
18. 18.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
19. 19.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) no crystals (d) smaller crystals
20. 20.🧂 Which of these does not dissolve in water? (a) food colour (b) sugar (c) small pebbles (d) table salt
21. 21.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
22. 22.⚖️ 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
23. 23.True or false: table salt dissolves in water. (a) True (b) False
24. 24.True or false: freezing water is a change that cannot be undone. (a) False (b) True
25. 25.⚖️ 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
26. 26.True or false: salt is not needed for growing salt crystals. (a) True (b) False
27. 27.⚖️ 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) False (b) True
28. 28.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) melting butter (c) rusting iron (d) browning lemon ink
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) False (b) True
30. 30.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
31. 31.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to cool the water (d) to change its colour
32. 32.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
33. 33.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
34. 34.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) salt (d) a magnet
36. 36.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) magnetic (d) empty
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 battery cell (d) warm water
38. 38.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
39. 39.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny triangles (d) tiny cubes
40. 40.True or false: yeast is needed for growing salt crystals. (a) False (b) True

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