Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 993 · 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.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) on the edge of a table (d) in a busy doorway
2. 2.True or false: folding paper is a change that can be undone. (a) False (b) True
3. 3.⚖️ 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
4. 4.True or false: chalk powder dissolves in water. (a) False (b) True
5. 5.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) folding paper (c) melting ice (d) baking a cake
6. 6.True or false: salt is needed for growing salt crystals. (a) True (b) False
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) turmeric powder (d) salt
8. 8.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) the youngest child (d) a grown-up
9. 9.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) empty (c) magnetic (d) saturated
10. 10.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to cool the water (d) to make it very salty
11. 11.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
12. 12.⚖️ 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 keep it the same (b) we change it (c) we measure it
13. 13.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) a balloon (d) a shallow dish
14. 14.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
15. 15.⚖️ 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
16. 16.True or false: freezing water is a change that cannot be undone. (a) True (b) False
17. 17.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) water evaporates (d) salt eats water
18. 18.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) sugar crystals form (d) it turns to oil
19. 19.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
20. 20.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) cooking oil (d) food colour
21. 21.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) folding paper (d) cooking an egg
22. 22.🧈 Which of these is a change that can be undone? (a) freezing water (b) browning lemon ink (c) milk turning to curd (d) rusting iron
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False
24. 24.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a magnet (c) a shallow dish (d) a piece of string
26. 26.⚖️ 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 keep it the same (b) we measure it (c) we change it
27. 27.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it turns sweet (d) it fizzes
28. 28.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) yeast (c) a spoon (d) a mirror
29. 29.⚖️ 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) the same dish (c) sunny or shady place (d) days to see crystals
30. 30.⚖️ 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
31. 31.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a piece of string (d) a magnet
33. 33.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) baking a cake (c) rusting iron (d) melting ice
34. 34.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
35. 35.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
36. 36.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
37. 37.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
38. 38.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting ice (c) browning lemon ink (d) melting butter
39. 39.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) days to see crystals (c) the same dish (d) the kind of salt

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