How many people are there in the text message?

Geographic information refers to the knowledge about the nature, characteristics and state performance of material and energy of geographical entities such as resources, environment, economy and society. Nature refers to their physical, chemical, biological, economic and social components, structures and attributes; Characteristics refer to their shape, size, temporal and spatial distribution and changing rules.

States mean that they are relatively dynamic or static, and so on. Material refers to resources, environment, economy, society and other entities; Energy refers to their mechanical energy (gravity), magnetic energy, electric energy, electromagnetic wave and biological, social and economic intangible energy.

Second, the area of the earth.

The equatorial radius of the earth is 6378. 137 km, the polar radius is 6356.752 km, the average radius is about 637 1 km, and the equatorial circumference is about 40076 km. It is an irregular oval sphere with slightly flat poles and slightly bulging equator. The surface area of the earth is 5 1 100 million square kilometers, of which 7 1% is ocean and 29% is land. Seen from space, the earth looks blue.

There are core, mantle and crust structures inside the earth, and hydrosphere, atmosphere and magnetic field outside the earth. The earth is the only celestial body in the universe where life is known to exist, and it is the home of millions of creatures, including humans.

Third, the population of the earth.

According to the US Census Bureau, as of 20 13, 1.4, there are 7.057 billion people in the world. According to the data of the US Census Bureau, the global population exceeded 7 billion in March 20 12.

According to the United Nations Population Fund, the global population will reach 7 billion in 20 1,1,3 1, 20 14 years. In 20 16, the world population reached 7262306342(72623 1 000).

Fourth, the human body

The human body consists of inorganic matter and organic matter. Inorganic substances are mainly sodium, potassium, phosphorus and water; Organic substances are mainly sugars, lipids, protein and nucleic acids, and the basic unit of human body structure is cells. There is a non-cellular substance between cells, called intercellular substance.

The surface of the human body is skin, so it looks young to maintain the whole body skin. There are muscles and bones in the skin.

Extended data

Since the Black Death and the Great Famine in Europe in 1950s, the world population has been increasing. There were about 370 million people in the world at that time. Subsequently, due to factors such as war, the growth rate was sometimes fast and sometimes slow.

After the end of World War II, from 1960s to 1950s, due to the decrease of factors (such as wars and famines) that caused the population growth to slow down, the world population growth rate obviously accelerated-exceeding 1.8% every year. This state continued until 1970.

From 65438 to 0963, the world population increased by 2.2%, reaching a historical peak. Subsequently, with the development of economy, people's concept of fertility has changed, and the population growth rate has gradually declined. 20 1 1 The annual world population growth rate is about 1. 1%. It is estimated that by 2040, the world population will reach 8 billion.

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Baidu Encyclopedia-Earth Information

Baidu Encyclopedia-Earth

Baidu Encyclopedia-World Population