Earth's Second Atmosphere The second atmosphere, which was the first to stay with the planet, formed from volcanic outgassing and comet ices. This atmosphere had lots of water vapor, carbon dioxide, nitrogen, and methane but almost no oxygen.
The answer is Light Pollution. Light pollution is typically caused in large cities.
When oceanic or continental plates slide past each other in opposite directions, or move in the same direction but at different speeds, a transform fault boundary is formed. No new crust is created or subducted, and no volcanoes form, but earthquakes occur along the fault.
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The answer is D- study of maps
74. It is believed that early humans crossed that _________ to get to North America.
Long time ago, our earth is filled with ice that connects all places around the world. Thus early humans crossed through frozen waters to migrate from one place to another. Since this is the scenario long years ago, I believe that early humans also crossed on the ice to be able to get to north America and live there for a period of time.
That is what History is telling us about our ancestors and our mother earth.
