13 questions and answers about the Earth

(ORDO NEWS) — 1- How did the Earth get its name?

All planets except Earth were named after Greek and Roman gods and goddesses. The name Earth is an English/German name that simply means earth. It comes from the Old English words “eor (th) e” and “ertha”. In German it is “erde”. The name Earth is at least 1000 years old.

2- How much water is on earth?

There are over 1500 million trillion liters of water on Earth. Less than three percent of all this water is fresh water, and of this amount, more than two-thirds is trapped in ice caps and glaciers.

3- How thick is the Earth’s ozone layer?

The Earth’s ozone layer is on average about 3 millimeters thick.

4- What connects our atmosphere to the Earth?

Our atmosphere is a mixture of gases that surround the Earth. It is held in place by the Earth’s gravity. If the Earth were a much smaller planet like Mercury or Pluto, its gravity would be too weak to hold on to a large atmosphere.

5- What is the earth’s atmosphere made of?

Earth’s atmosphere is 78% nitrogen, 21% oxygen, 0.9% argon, and 0.03% carbon dioxide, with a very small percentage of other elements. Our atmosphere also contains water vapor. In addition, the Earth’s atmosphere contains traces of dust particles, pollen, plant grains, and other particulate matter.

6- What are the highest and lowest temperatures on Earth?

The highest temperature ever recorded on Earth in the Libyan desert was 58 degrees Celsius. The lowest temperature ever measured was -88 Celsius at Vostok Station in Antarctica.

7- What is the position of the Earth in space?

Well, the Earth is in the universe in the supercluster of galaxies in Virgo. A supercluster is a group of galaxies held together by gravity.

Within this supercluster, we are in a small group of galaxies called the Local Group. Earth is in the second largest galaxy in the Local Group, a galaxy called the Milky Way. The Milky Way is a large spiral galaxy.

The Earth is located in one of the Milky Way’s spiral arms (called the Orion Arm), which is about two thirds of the distance from the center of the Galaxy.

Here we are part of the solar system – a group of eight planets, as well as numerous comets, asteroids and dwarf planets orbiting the sun. We are the third planet from the sun in the solar system.

8- How much does the Earth weigh and how is it measured?

The earth weighs about 5,974,000,000,000,000,000,000,000 kilograms. Because the Earth is too big to fit on a scale, scientists use math and the laws of gravity to determine the Earth’s weight.

9- Why can’t we feel the movement of the Earth?

The earth is moving very fast. It rotates at about 1600 km per hour and revolves around the Sun at about 107,000 km per hour. We do not feel this movement because these speeds are constant.

The Earth’s rotational speed and orbital speed remain constant, so we don’t feel any acceleration or deceleration. You can only feel movement when changing speed.

For example, if you are in a car that is moving at a constant speed on a smooth surface, you will not feel the speed of the movement. However, when the car accelerates or brakes, you feel movement.

10- Why does the earth rotate?

The earth rotates because of the way it was formed. Our solar system formed about 4.6 billion years ago when a huge cloud of gas and dust began to collapse under its own gravity. As the cloud collapsed, it began to spin.

Some of the material in this cloud collected into swirling eddies and eventually turned into planets. When the planets formed, they retained this rotational motion. This is similar to what you see when skaters raise their arms and spin faster.

As the material gathered more tightly to form a planet like Earth, the material rotated faster. The earth keeps spinning because there are no forces that can stop it.

11- What is the earth made of?

The earth is made up of many things. Deep inside the Earth, near its center, lies the core of the Earth, which is mostly nickel and iron.

Above the core is the Earth’s mantle, which is composed of rocks containing silicon, iron, magnesium, aluminum, oxygen, and other minerals. The earth’s rocky surface layer, called the crust, is composed primarily of oxygen, silicon, aluminium, iron, calcium, sodium, potassium, and magnesium.

Earth’s surface is mostly covered with liquid water, and its atmosphere is mostly nitrogen and oxygen, with smaller amounts of carbon dioxide, water vapor, and other gases.

12- How big is the earth?

The circumference of the earth (the distance around the equator) is 40,075 kilometers. Its diameter (the distance from one side to the other through the center of the Earth) is about 12,756 kilometers.

The Earth is slightly smaller when measured between the North and South Poles, giving a diameter of 12,725 kilometers. The earth bulges slightly more around the equator than around the poles due to its rotation.

13- How old is the earth?

The Earth is believed to be between 4.5 and 4.8 billion years old. The age of the earth is determined by measuring the age of very old earth rocks. This is done by measuring the rate at which radioactive uranium metal elements decay into lead.

Scientists also measured the age of meteorites that fell to the Earth’s surface and the age of lunar rocks brought back by the Apollo astronauts. Both meteorites and the Moon formed around the same time as the Earth and have the same age.

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