Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 177 · 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 a piece of string for growing salt crystals? (a) needed (b) not needed
2. 2.⚖️ 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) False (b) True
3. 3.True or false: sawdust does not dissolve in water. (a) True (b) False
4. 4.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
5. 5.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
6. 6.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) yeast (c) salt (d) a spoon
7. 7.⚖️ 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) False (b) True
8. 8.⚖️ 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 change it (c) we keep it the same
9. 9.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a battery cell (c) salt (d) yeast
11. 11.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) the dish melts (d) water evaporates
12. 12.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
13. 13.True or false: freezing water is a change that can be undone. (a) False (b) True
14. 14.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
15. 15.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
16. 16.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
17. 17.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) milk turning to curd (d) folding paper
18. 18.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) saturated (c) magnetic (d) empty
19. 19.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.True or false: sugar dissolves in water. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) baking soda (d) cooking oil
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
23. 23.True or false: sand dissolves in water. (a) True (b) False
24. 24.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
25. 25.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
26. 26.🔍 Which is the odd one out? (a) sand (b) baking soda (c) glucose powder (d) food colour
27. 27.True or false: rusting iron is a change that can be undone. (a) False (b) True
28. 28.True or false: table salt does not dissolve in water. (a) False (b) True
29. 29.⚖️ 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 change it (b) we measure it (c) we keep it the same
30. 30.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
31. 31.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) it turns sweet (d) few or no crystals
32. 32.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) fish make it (c) sea water evaporates (d) salt rains down
33. 33.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) the youngest child (d) a grown-up
34. 34.⚖️ 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 kind of salt (b) the same dish (c) the amount of salt (d) days to see crystals
35. 35.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
36. 36.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
37. 37.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
38. 38.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) it turns to butter (d) salt crystals form
39. 39.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) salt (d) a magnet

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