The Planet Earth

The Planet Earth

1. Planet Earth

• The third planet from the sun in our solar system.
• Surface area: 510 million km2: 30% land (continents
• and islands) and 70% water (oceans, rivers, seas, and
• The Earth lakes.
• The blue planet: it looks white and blue from space.

Cause: cloud in the atmosphere/most of the Earth´s surface is water. Formed around four and a half billions of year ago. Life appeared in its oceans affecting atmosphere First billion years Proliferation of anaerobic organism Formation of ozono layer The Sun: is about 150 million km2 away.

Origins

• The shape of the Earth:
• Earth: is a sphere.
• It´s flat at two geographic points called poles. The top point is called North Pole and the bottom one the South Pole.
• It´s usually represented as a sphere with an imaginary axis going through it from pole to pole.
• There is also an imaginary circle around the Earth: equator. This divides it into two hemispheres: northern and southern hemispheres

• The Earth is the only planet in the solar system where life is known to exist.

The surface temperature: The presence of liquid water The atmosphere: Makes it possible for water Life: possible for animals, plants protects living to remain in a liquid state. and people. things from solar radiation

CONDITIONS