INTRODUCTION

The world is a proper noun for the planet Earth envisioned from an anthropocentric or human worldview, as a place inhabited by human beings. It is often used to signify the sum of human experience and history, or the 'human condition' in general.
Well, below is a main title for the this knowledge of planet earth :

• The making of Universe
• Star and Sun
• The birth of the Planets
• Man on the Moon
• Comets, meteors and asteroids
• Spinning Earth
• Inside the Earth
• Volcanoes and Earthquakes
• The Earth’s atmosphere
• Weather and climate
• Mountains and mountain ranges
• Rivers and lakes
• Oceans and seas
• Around the coast
• Grasslands
• Forests
• Deserts
• Polar regions
• Rocks and minerals
• Gems and precious metals
• Fossil fuels

The other info that you can know :

• The night sky
• Planets
• Exploration of space
• Geological timescale
• Landscapes
• Seas and oceans
• Zones of living
• Global Energy
• Natural disasters