Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 924 · 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.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) False (b) True
2. 2.⚖️ 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 same dish (b) the amount of water (c) sunny or shady place (d) days to see crystals
3. 3.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) water evaporates (d) the dish melts
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) a magnet (d) warm water
5. 5.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
6. 6.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny spheres (d) tiny cubes
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
8. 8.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
9. 9.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
10. 10.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) a piece of string (d) a mirror
12. 12.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
13. 13.⚖️ 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 same dish (c) the amount of salt (d) days to see crystals
14. 14.🧂 Which of these dissolves in water? (a) sand (b) sugar (c) small pebbles (d) chalk powder
15. 15.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
16. 16.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) milk turning to curd (c) melting butter (d) melting ice
17. 17.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
18. 18.🛟 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
19. 19.True or false: melting butter is a change that cannot be undone. (a) False (b) True
20. 20.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) cooking oil (b) small pebbles (c) chalk powder (d) table salt
22. 22.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it very salty (c) to make it fizz (d) to change its colour
23. 23.True or false: glucose powder does not dissolve in water. (a) True (b) False
24. 24.⚖️ 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 keep it the same (c) we measure it
25. 25.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
26. 26.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
27. 27.⚖️ 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) the same dish (c) sunny or shady place
28. 28.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
29. 29.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a magnet (c) turmeric powder (d) warm water
30. 30.⚖️ 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
31. 31.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) food colour (d) cooking oil
32. 32.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
33. 33.⚖️ 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
34. 34.🧂 Which of these does not dissolve in water? (a) sand (b) food colour (c) glucose powder (d) baking soda
35. 35.🔍 Which is the odd one out? (a) sand (b) table salt (c) baking soda (d) glucose powder
36. 36.⚖️ 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 change it (b) we measure it (c) we keep it the same
37. 37.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) sawdust (d) glucose powder
38. 38.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
39. 39.True or false: folding paper is a change that cannot be undone. (a) False (b) True
40. 40.True or false: browning lemon ink is a change that can be undone. (a) False (b) True

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