Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 389 · 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.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) the dish melts (c) salt grows roots (d) salt eats water
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we measure it (b) we change it (c) we keep it the same
3. 3.⚖️ 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
4. 4.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
5. 5.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
6. 6.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
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) the same dish (b) the amount of salt (c) days to see crystals (d) the kind of salt
8. 8.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
9. 9.🔍 Which is the odd one out? (a) baking soda (b) chalk powder (c) table salt (d) glucose powder
10. 10.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) a shallow dish (d) yeast
11. 11.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) fish make it (c) salt rains down (d) sand is ground up
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
13. 13.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
14. 14.True or false: table salt dissolves in water. (a) True (b) False
15. 15.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) cooking oil (d) glucose powder
16. 16.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a balloon (c) salt (d) a piece of string
17. 17.True or false: melting ice is a change that cannot be undone. (a) False (b) True
18. 18.🧂 Which of these does not dissolve in water? (a) small pebbles (b) food colour (c) sugar (d) table salt
19. 19.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
20. 20.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
21. 21.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) yeast (d) a shallow dish
23. 23.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) turmeric powder (c) warm water (d) a magnet
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
25. 25.🧂 Which of these does not dissolve in water? (a) cooking oil (b) table salt (c) food colour (d) sugar
26. 26.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
27. 27.🧺 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) warm water
28. 28.⚖️ 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) True (b) False
29. 29.⚖️ 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
30. 30.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
31. 31.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to cool the water (d) to make it very salty
32. 32.True or false: melting butter is a change that can be undone. (a) True (b) False
33. 33.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
34. 34.True or false: freezing water is a change that cannot be undone. (a) True (b) False
35. 35.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a mirror (d) a spoon
37. 37.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) cooking an egg (d) melting ice
38. 38.⚖️ 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) days to see crystals (c) the same dish
39. 39.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed

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