Topic Details (Notes format)

What are the two main gases in Earth’s atmosphere?

Which Indian festival celebrates the bond between brothers and sisters?

Which element has the chemical symbol "Pd"?

Which key invention is Johannes Gutenberg known for?

Which organ in the body filters waste from the blood to produce urine?

Which empire’s capital was Persepolis, established by Cyrus the Great and Darius I?

Which tower in Pisa, Italy, is famous for its unintended tilt?

Which is the world’s largest desert?

In which ocean is the archipelago of the Maldives located?

Which civilization developed the world’s first known writing system, cuneiform, in Mesopotamia?