Core, mantle, and crust are divisions based on composition.

This is a table that shows the elemental chemical composition of the Earth's crust. Finally, the core is mostly iron metal. The core makes up about 31% of the Earth. Without this magnetic field, our Earth could never have atmosphere, oceans, and life. Without this layers, our Earth couldn’t have a magnetic field. This magnetic field protects our Earth from the Sun’s deadly wind. This video illustrates the chemical make up of our planet. The crust makes up less than 1 percent of Earth by mass, consisting of oceanic crust and continental crust is often more felsic rock. 98.4% of the Earth's crust consists of oxygen , silicon, aluminum, iron, … The mantle is hot and represents about 68 percent of Earth’s mass.
It starts by introducing the chemical composition of the planet as a whole. They will vary depending on the way they were calculated and the source. Keep in mind, these numbers are estimates. Earth is the third planet from the Sun and the only astronomical object known to harbor life.According to radiometric dating estimation and other evidence, Earth formed over 4.5 billion years ago. This is the hottest layer of the Earth, reaching a temperature of 7000 C; much hotter than the surface of the Sun. What is Earth made of?
Inner Core. Trace amounts of carbon dioxide, water vapor, and other gases are also present. The composition of the atmosphere of Earth is 21 percent molecular oxygen, 78 percent molecular nitrogen, and 1 percent argon.


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