Presentation on our earth?

Question

Presentation on our earth?

Answer 1

Many people could write a book on this.  I am not quite sure what you want so I will just give you some facts about the Earth.

Earth is the fifth largest planet in the Solar System.

The Earth is around 4.6 billion years old.

Earth is the only presently known planet in the Solar System to support life.

The earliest fossil evidence for life dates back 3.5 billion years ago.

71% of Earth's surface is covered in water.

The Earth is the densest planet in the Solar System.

The Earth travels at an orbital speed of 108,000 km (67,000 miles) an hour.

The Earth has only one satellite, the Moon.

The Earth's atmosphere is composed mainly of nitrogen (77%), oxygen (21%), argon (.93%), and carbon dioxide (0.03%).

The surface features on Earth are extremely varied with vast oceans, tall mountains, rolling plains, canyons, swamps, and deserts.

The tallest mountain on our planet, Mount Everest in the Himalayas, stands at an altitude of 8,872 m (29,108 ft).

Located in Africa, the Sahara, the largest desert on Earth, spans over 500,000 sq km (2,123,000 sq miles) of land.

The Grand Canyon, a canyon of multi covered rock terraces cut by the Colorado River, stretches over 350 km (217 miles) of land.

Earth's water holds vast amounts of ocean life and maintains the temperature of the planet.

Earth has an average surface temperature of 13 degrees C (55.4 degrees F).

Earth is composed of three layers: a core, a mantle, and an outer crust.

The core is composed of two parts: an inner core of solid iron and nickle (2,600 km in diamter), and an outer core made of molten iron and nickle (2,250 km thick).

The mantle is partially molten liquid (2,900 km thick).

The crust (8 to 40 km thick) is composed of over twenty plates that float on top of the hot mantle.

The motion of these plates is called tectonic drift.

Tectonic drift is responsible for seafloor spreading and continental drift.

The Earth rotates (spins) on an imaginary axis at a speed of about 467 m per second at the equator.

Viewed from the North Pole, the direction of rotation is counter-clockwise.

One rotation takes exactly twenty-four hours and is called a mean solar day.

The Earth’s rotation is responsible for the daily cycles of day and night.

The orbit of the Earth around the Sun is called an Earth revolution.

One revolution takes 365.26 days to complete-one year.

The Earth's orbit around the Sun is not circular, but oval or elliptical .

The Earth is tilted 23.5 degrees on its axis.

This tilt causes the seasons.

Now, you create your presentation.