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.
Volcanoes
Volcanoes push up the earth. They form mountains and plateaus. They also make new ground and provide fertile soil. That is how they change the earth's surface.
Tsunami
Tsunamis are some of the most devastating natural disasters known to man. Think of a flood with its source being an ocean and you can grasp a little of how much devastation tsunamis can create. For most people who live in land the greatest threat is from overflowing rivers and creeks. Normally extraordinarily heavy rainfall causes rivers and and other waterways to overflow. The excess water creates deadly currents and sweep away people, causing them to drown. It also does a lot of damage in the initial surge and then with standing water.
Comets
A comet is a celestial object consisting of nucleus, ice, dust, and when near the sun a tail of gas and dust particles pointing away from the sun. Comets effect Earth in many ways. One way is that they can cause fireballs to fall to earth and destroy lives, buildings, or the environment.
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.
School is Awesome!!!
Stay in School Kids!!!!!
Fossils
Law of Superposition
The law of superposition is a key axiom based on observations of natural history that is a foundational principle of sedimentary stratigraphy.
What Fossils Can Tell us About the History of the Earth?
Fossils, which are evidence of life from long ago, can tell us many things about the Earth. They can tell us what creatures existed before us, how big they were, or what humans from long ago did survive.
Are all Fossils the Same?
No Fossils are all different. Like human DNA. Just like how no humans eyes are exactly alike. That applies to animals too.
Rocks and Minerals
Igneous Rock
Igneous rocks are called fire rocks and are formed either underground or above ground.
Sedimentary Rock
Sedimentary Rocks are rocks formed by consolidated sediment deposited in layers. Rock Salt is a chemical sedimentary rock that forms from the evaporation of ocean or saline lake waters.
Metamorphic Rock
Metamorphic rocks are rocks that have morphed into another kind if rock. These rocks were on igneous or sedimentary rocks.They turn into metamorphic rocks from being under tons of pressure, which fosters heat build heat builds up and causes them to change.
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.