Location and Size of earth
- Earth is the third planet from the Sun in our solar system.
- It is located between Venus and Mars.
- The Earth’s equatorial diameter is approximately 12,742 kilometers (7,918 miles).
Basic structure of earth
- earth is divided into three main layers the crust , mantle and core.
- The outermost layer, the crust, is solid and divided into tectonic plates.
- The mantle is semi-solid, and the core consists of a solid inner part and a liquid outer part.
Atmosphere
- Earth’s atmosphere is composed mainly of nitrogen (about 78%) and oxygen (about 21%).
- The atmosphere protects life on Earth by blocking harmful solar radiation and regulating temperatures.
Climate of earth
- Earth has a diverse range of climates, from polar regions to tropical zones.
- Factors influencing climate include latitude, altitude, and proximity to bodies of water.
water
- Approximately 71% of Earth’s surface is covered by water, primarily in the form of oceans.
- The Pacific Ocean is the largest, followed by the Atlantic, Indian, Southern, and Arctic Oceans.
Biosphere
- Earth is home to a vast variety of living organisms, forming the biosphere.
- The biosphere includes ecosystems ranging from forests and deserts to oceans and grasslands.
Life
- Earth is the only known planet to support life.
- The diversity of life includes plants, animals, fungi, bacteria, and other microorganisms.
Rotation and Orbit
- Earth rotates on its axis, completing one full rotation approximately every 24 hours.
- It orbits the Sun in an elliptical shape, taking about 365.25 days to complete one orbit.
Moon
- Earth has one natural satellite, the Moon.
- The Moon is about 1/6th the size of Earth and influences tides through gravitational forces.
Human Impact
- Human activities, such as deforestation and industrialization, have significant impacts on the environment.
- Issues like climate change, pollution, and loss of biodiversity are global concerns.