Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 169 · 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 a change that cannot be undone? (a) browning lemon ink (b) melting ice (c) folding paper (d) melting butter
2. 2.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) salt eats water (d) the dish melts
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a balloon (d) salt
4. 4.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) baking a cake (c) rusting iron (d) melting ice
5. 5.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
6. 6.🧂 Which of these dissolves in water? (a) cooking oil (b) sand (c) baking soda (d) small pebbles
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) yeast (c) a shallow dish (d) salt
8. 8.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
9. 9.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a piece of string (c) salt (d) a battery cell
12. 12.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) nobody needs to (d) a friend who is running
13. 13.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
14. 14.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to butter (d) it turns to oil
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) True (b) False
16. 16.⚖️ 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) the amount of water (c) the same dish (d) days to see crystals
17. 17.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
18. 18.🧂 Which of these does not dissolve in water? (a) baking soda (b) food colour (c) sugar (d) sawdust
19. 19.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a magnet (c) a spoon (d) a piece of string
21. 21.True or false: salt is not needed for growing salt crystals. (a) False (b) True
22. 22.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
23. 23.⚖️ 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 keep it the same (c) we change it
24. 24.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) empty (d) magnetic
25. 25.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
26. 26.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
27. 27.🧂 Which of these does not dissolve in water? (a) chalk powder (b) sugar (c) glucose powder (d) table salt
28. 28.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a balloon (c) a mirror (d) a piece of string
29. 29.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) rusting iron (c) baking a cake (d) dissolving salt
30. 30.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
31. 31.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) next to the baby (d) safe from small children
32. 32.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a battery cell (c) a piece of string (d) a spoon
34. 34.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
35. 35.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
36. 36.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.True or false: cooking oil does not dissolve in water. (a) False (b) True
38. 38.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a piece of string (c) a shallow dish (d) turmeric powder
39. 39.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
40. 40.True or false: baking a cake is a change that can be undone. (a) False (b) True

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