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This endangered mandrill (Mandrillus sphinx) was photographed by National Geographic Photographer Joel Sartore on Bioko Island, Equatorial Guinea, in his ambitious project to document every species in captivity—inspiring people not just to care, but also to help protect these animals for future generations. Before drills disappear, like this webpage has, learn how …
Formation of Earth - National Geographic Society
2023年10月19日 · Earth’s early atmosphere was most likely composed of hydrogen and helium. As the planet changed, and the crust began to form, volcanic eruptions occurred frequently. These volcanoes pumped water vapor, ammonia, and …
Formation of Earth - Education
2023年10月19日 · Scientists think Earth formed in three different stages. The first stage is known as accretion. Particles within the solar system crashed into each other and stuck together forming larger and larger bodies.
How Did Scientists Calculate the Age of Earth? - Education
2023年10月19日 · The examination and analysis of rocks on Earth’s surface, and of extraterrestrial rocks, have enabled scientists to determine the approximate age of the planet.
Formation of Earth - Education
2023年10月19日 · At its beginning, Earth was unrecognizable from its modern form. At first, it was extremely hot, to the point that the planet likely consisted almost entirely of molten magma. Over the course of a few hundred million years, the planet began to …
Plate Tectonics - Education
2024年3月7日 · Plate tectonics is a scientific theory that explains how major landforms are created as a result of Earth’s subterranean movements. The theory, which solidified in the 1960s, transformed the earth sciences by explaining many phenomena, including mountain building events, volcanoes, and earthquakes.
Plate Tectonics and Volcanic Activity - Education
2024年4月29日 · Most volcanoes form at the boundaries of Earth’s tectonic plates. These plates are huge slabs of Earth’s crust and upper mantle, which fit together like pieces of a puzzle. These plates are not fixed, but are constantly moving at a very slow rate. They move only a few centimeters per year.
Petroleum (also known as crude oil or simply oil) is a fossil fuel that was formed from the remains of ancient marine organisms. Millions of years ago, algae and plants lived in shallow seas.
Crust - Education | National Geographic Society
2024年4月25日 · Dynamic geologic forces created Earth’s crust, and the crust continues to be shaped by the planet’s movement and energy. Today, tectonic activity is responsible for the formation (and destruction) of crustal materials. Earth’s crust is divided into two types: oceanic crust and continental crust.
There are several different theories to explain how fossil fuels are formed. The most prevalent theory is that they form underground, under intense conditions. As plants, animals, and microorganisms decompose, they are gradually covered by layers of soil, sediment, and sometimes rock. Over millions of years, the organic matter is compressed.