Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 104 · 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.True or false: cooking oil dissolves in water. (a) False (b) True
2. 2.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
3. 3.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
4. 4.⚖️ 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) False (b) True
5. 5.🧂 Which of these dissolves in water? (a) small pebbles (b) cooking oil (c) sand (d) food colour
6. 6.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) glucose powder (d) cooking oil
7. 7.🧂 Which of these dissolves in water? (a) sand (b) glucose powder (c) chalk powder (d) sawdust
8. 8.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
9. 9.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) freezing water (c) melting ice (d) dissolving salt
10. 10.True or false: sand does not dissolve in water. (a) True (b) False
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) True (b) False
12. 12.⚖️ 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 amount of water (b) the amount of salt (c) sunny or shady place (d) days to see crystals
13. 13.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
14. 14.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) salt crystals form (c) it turns to butter (d) sugar crystals form
15. 15.True or false: salt is needed for growing salt crystals. (a) False (b) True
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) salt (d) a magnet
17. 17.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
18. 18.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
19. 19.🛟 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
20. 20.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) False (b) True
22. 22.True or false: melting butter is a change that cannot be undone. (a) False (b) True
23. 23.🔍 Which is the odd one out? (a) sand (b) sugar (c) chalk powder (d) cooking oil
24. 24.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
25. 25.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
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 water”? (a) we measure it (b) we change it (c) we keep it the same
27. 27.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
28. 28.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
29. 29.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
30. 30.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
31. 31.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) salt grows roots (d) water evaporates
32. 32.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
33. 33.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
34. 34.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) safe from small children (d) in a busy doorway
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a spoon (c) a piece of string (d) salt
36. 36.⚖️ 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 amount of water (c) sunny or shady place (d) days to see crystals
37. 37.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) freezing water (c) folding paper (d) dissolving salt
38. 38.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the amount of water (b) sunny or shady place (c) days to see crystals
40. 40.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny stars (d) tiny spheres

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