Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 646 · 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? Which of these is what we measure? (a) the same dish (b) the kind of salt (c) the amount of salt (d) days to see crystals
2. 2.⚖️ 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 kind of salt (b) sunny or shady place (c) days to see crystals
3. 3.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) a piece of string (c) a spoon (d) salt
4. 4.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) salt (c) a magnet (d) a balloon
5. 5.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) in a busy doorway (d) safe from small children
6. 6.⚖️ 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) False (b) True
7. 7.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
8. 8.True or false: melting butter is a change that cannot be undone. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) sugar (d) small pebbles
10. 10.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
11. 11.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
12. 12.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
13. 13.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny stars (d) tiny spheres
14. 14.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
15. 15.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
16. 16.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
17. 17.⚖️ 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
18. 18.True or false: table salt does not dissolve in water. (a) False (b) True
19. 19.⚖️ 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) False (b) True
20. 20.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) yeast (c) a battery cell (d) a spoon
21. 21.True or false: small pebbles dissolves in water. (a) True (b) False
22. 22.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) melting butter (c) melting ice (d) dissolving salt
23. 23.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) folding paper (c) browning lemon ink (d) baking a cake
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) the amount of water (b) days to see crystals (c) sunny or shady place
25. 25.🔍 Which is the odd one out? (a) table salt (b) sand (c) baking soda (d) sugar
26. 26.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a magnet (c) salt (d) warm water
28. 28.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) crystals grow faster (d) it fizzes
29. 29.⚖️ 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
30. 30.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
31. 31.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
32. 32.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) dissolving salt (c) milk turning to curd (d) browning lemon ink
33. 33.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) salt (c) a piece of string (d) warm water
35. 35.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to change its colour (c) to cool the water (d) to make it fizz
36. 36.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
37. 37.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) melting butter (c) melting ice (d) folding paper
38. 38.True or false: melting ice is a change that can be undone. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) chalk powder (d) sugar
40. 40.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed

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