Answer:
the earth is huge and round
Explanation:
These examples of different uses of the geographic perspective help explain why geographic study and research is important as we confront many 21st century challenges, including environmental pollution, poverty<span>, </span>hunger<span>, and </span>ethnic<span> or political </span>conflict.
<span>Because the study of geography is so broad, the discipline is typically divided into specialties. At the broadest level, geography is divided into </span>physical geography<span>, </span>human geography<span>, </span>geographic techniques<span>, and </span>regional geography<span>. </span>
Rock layers can be dated using radiometric dating because it can change how we think about them. This allows us to determine the relative ages of these rock layers.
Rock is a naturally occurring, cohesive aggregation of one or more minerals in geology. These aggregates often form recognisable and mappable volumes and make up the fundamental component of the solid Earth. According to the processes that led to their formation, rocks are typically categorized into three major classes.
These three categories of rocks are: (1) igneous rocks, which have crystallized from molten rock known as magma; (2) sedimentary rocks, which are made up of pieces of other rocks or of substances that have precipitated from solutions; and (3) metamorphic rocks, which have been created from either igneous or sedimentary rocks under conditions that have changed their mineralogical composition, texture, and internal structure. These three classes are further divided into multiple groups and types based on a variety of variables.
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During the early earth, when photosynthesis has not yet evolved, there were only negligible amounts of free oxygen in the atmosphere. It was said that the Earth's atmosphere had no free oxygen then. This is about 3.5 billion years ago.
