Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 324 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a magnet (c) warm water (d) a spoon
2. 2.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
3. 3.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to cool the water (c) to make it fizz (d) to change its colour
4. 4.🔍 Which is the odd one out? (a) food colour (b) sawdust (c) sand (d) chalk powder
5. 5.🔍 Which is the odd one out? (a) sawdust (b) food colour (c) baking soda (d) table salt
6. 6.True or false: melting butter is a change that cannot be undone. (a) True (b) False
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) sunny or shady place (c) the kind of salt (d) the amount of salt
8. 8.🧈 Which of these is a change that can be undone? (a) folding paper (b) milk turning to curd (c) browning lemon ink (d) baking a cake
9. 9.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
10. 10.⚖️ 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
11. 11.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
12. 12.⚖️ 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) sunny or shady place (b) the kind of salt (c) the amount of water (d) the amount of salt
13. 13.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a mirror (c) warm water (d) a battery cell
14. 14.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
15. 15.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
16. 16.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
17. 17.True or false: food colour dissolves in water. (a) False (b) True
18. 18.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
19. 19.🧂 Which of these dissolves in water? (a) chalk powder (b) cooking oil (c) table salt (d) sand
20. 20.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
21. 21.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) it fizzes (d) crystals grow faster
22. 22.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
23. 23.🧂 Which of these does not dissolve in water? (a) baking soda (b) table salt (c) sugar (d) sawdust
24. 24.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
25. 25.True or false: baking soda dissolves in water. (a) False (b) True
26. 26.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) the dish melts (d) salt grows roots
27. 27.True or false: warm water is needed for growing salt crystals. (a) True (b) False
28. 28.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny spheres (d) tiny cubes
29. 29.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
30. 30.🧂 Which of these does not dissolve in water? (a) glucose powder (b) food colour (c) sugar (d) chalk powder
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we keep it the same (b) we change it (c) we measure it
32. 32.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
33. 33.🛟 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
34. 34.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
35. 35.⚖️ 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
36. 36.🧂 Which of these does not dissolve in water? (a) sugar (b) cooking oil (c) table salt (d) food colour
37. 37.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) small pebbles (d) food colour
38. 38.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a balloon (d) a spoon
40. 40.⚖️ 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 keep it the same (c) we measure it

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids