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A nebula contains gas, ice grains, and dust (including primordial nuclides).
According to nebular theory, planetesimals formed by accretion, with the primordial Earth taking 10– Earth's atmosphere and oceans were formed by volcanic activity and outgassing that included water vapor.
Earth's lithosphere is divided into several rigid tectonic plates that migrate across the surface over periods of many millions of years.
Within the first billion years of Earth's history, life appeared in the oceans and began to affect the Earth's atmosphere and surface, leading to the proliferation of aerobic and anaerobic organisms.On time scales lasting hundreds of millions of years, the supercontinents have assembled and broken apart.Roughly True multicellular organisms formed as cells within colonies became increasingly specialized.It has cognates in every Germanic language, and their proto-Germanic root has been reconstructed as *erþō.In its earliest appearances, eorðe was already being used to translate the many senses of Latin terra and Greek γῆ (gē): the ground, Originally, earth was written in lowercase, and from early Middle English, its definite sense as "the globe" was expressed as the earth.