Across
- 2. number of chambers in human heart.
- 4. is also known as the Red planet.
- 5. driver of a train called?
- 8. is in the largest proportion in the earth's atmosphere
Down
- 1. group of stars
- 3. first element in the periodic table of elements.
- 6. bird depicts the symbol of peace.
- 7. largest continent in the world.