Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 845 · 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) on the edge of a table (b) safe from small children (c) next to the baby (d) in a busy doorway
2. 2.🛟 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
3. 3.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) crystals grow faster (d) few or no crystals
4. 4.⚖️ 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
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a battery cell (d) a spoon
7. 7.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
8. 8.True or false: melting ice is a change that can be undone. (a) True (b) False
9. 9.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
10. 10.🔍 Which is the odd one out? (a) food colour (b) small pebbles (c) sawdust (d) sand
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a balloon (c) salt (d) a shallow dish
12. 12.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) salt (d) yeast
13. 13.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) milk turning to curd (c) dissolving salt (d) melting ice
14. 14.⚖️ 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 change it (b) we measure it (c) we keep it the same
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
16. 16.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
17. 17.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) salt eats water (d) water evaporates
18. 18.🧂 Which of these dissolves in water? (a) glucose powder (b) sand (c) sawdust (d) cooking oil
19. 19.True or false: salt is not needed for growing salt crystals. (a) True (b) False
20. 20.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
21. 21.🔮 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
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a shallow dish (c) a spoon (d) warm water
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the kind of salt
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the same dish (c) days to see crystals
25. 25.True or false: sand dissolves in water. (a) False (b) True
26. 26.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sand is ground up (c) fish make it (d) sea water evaporates
27. 27.True or false: food colour dissolves in water. (a) False (b) True
28. 28.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
29. 29.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny spheres (d) tiny triangles
30. 30.True or false: warm water is needed for growing salt crystals. (a) False (b) True
31. 31.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
32. 32.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
33. 33.True or false: table salt does not dissolve in water. (a) True (b) False
34. 34.🧂 Which of these does not dissolve in water? (a) sugar (b) sand (c) table salt (d) food colour
35. 35.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) baking a cake (d) folding paper
36. 36.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) chalk powder (d) baking soda
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) yeast (d) warm water
38. 38.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
39. 39.⚖️ 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
40. 40.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True

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