Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 353 · 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 spoon for growing salt crystals? (a) not needed (b) needed
2. 2.🧺 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 balloon (d) a spoon
3. 3.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
4. 4.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) salt eats water (d) water evaporates
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a mirror (d) a shallow dish
6. 6.True or false: warm water is needed for growing salt crystals. (a) True (b) False
7. 7.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) warm water (c) a balloon (d) a piece of string
8. 8.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
9. 9.⚖️ 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
10. 10.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
11. 11.True or false: freezing water is a change that cannot be undone. (a) True (b) False
12. 12.🧈 Which of these is a change that can be undone? (a) rusting iron (b) melting ice (c) cooking an egg (d) baking a cake
13. 13.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
14. 14.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
15. 15.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a battery cell (d) a piece of string
17. 17.⚖️ 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 keep it the same (b) we change it (c) we measure it
18. 18.True or false: sawdust does not dissolve in water. (a) False (b) True
19. 19.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
20. 20.🧂 Which of these dissolves in water? (a) cooking oil (b) sawdust (c) small pebbles (d) baking soda
21. 21.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) sugar crystals form (d) salt crystals form
22. 22.True or false: salt is not needed for growing salt crystals. (a) False (b) True
23. 23.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) a piece of string (d) a mirror
24. 24.True or false: table salt dissolves in water. (a) True (b) False
25. 25.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
26. 26.🔍 Which is the odd one out? (a) cooking oil (b) small pebbles (c) glucose powder (d) sand
27. 27.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny cubes (c) tiny triangles (d) tiny stars
28. 28.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) cooking an egg (c) dissolving salt (d) melting ice
29. 29.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) few or no crystals (d) it fizzes
30. 30.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
31. 31.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
32. 32.🛟 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
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) True (b) False
34. 34.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
35. 35.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) milk turning to curd (d) folding paper
36. 36.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.🧂 Which of these does not dissolve in water? (a) food colour (b) baking soda (c) chalk powder (d) glucose powder
38. 38.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
39. 39.True or false: melting butter is a change that can be undone. (a) True (b) False
40. 40.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water

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