Earth's Surface

Savannah

What evidence is there that the plates have moved?

We have GPS measurements at different plates. There is also evidence from earthquakes: They are caused by movement at plate boundaries, and evidence from geology. A tectonic plate is a massive irregularly shaped slab of solid rock generally is composed of both continental and oceanic lithosphere. The type of tectonic plate boundaries are divergent, convergent, and transform.

Erosion

What is Erosion?

Erosion is the process of eroding or being eroded by wind, water, or other natural agents. The three main types of erosion are wind, liquid water, and ice. Erosion is the product of weathering and transportation. Water has the biggest effect on earth's surface. Wind has the least effect on earth's surface.

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Fossils

Rocks and Minerals

The Rock Cycle

The rock cycle is a fundamental concept in geology that describes the dynamic transitions through geologic time among the three main rock types: sedimentary, metamorphic, and igneous. As the diagram to the right illustrates, each of the types of rocks are altered or destroyed when it is forced out of its equilibrium conditions. An igneous rock such as basalt may break down and dissolve when exposed to the atmosphere.

Minerals

Minerals are mostly formed as a result of changes in the earth's crust. This generally happens when the plates bump together. Minerals are also formed from decayed living organisms such as like animals or vegetables. Minerals are identified by testing their color, hardness, luster, streak, Fluorescence, and Chemical Composition.

What I enjoyed!

I enjoyed learning about different tsunamis and how strong they are. I didn't know all of that stuff before.