i wonder how our earth was formed
it goes back a very long time , about 4.7 billion years ago .
scientist have believed the earth congealed from the cloud of dust and gases that also formed the sun and other planets .
the earth may have trapped some of those gases within its mantle , volcanic eruptions returned the gases to earths surface where gravity kept them from drifting apart .
the mixing of gases along with oxegan and other molecules added by life created the atmosphere we have today .
i understand now thank you mr.lopez
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