Regardless of the
abundance of worlds in our solar system, scientists still are not certain how
planets are created. The Earth was naturally created 4.5 billion years ago. With
the rise of the sun, small particles came together and became larger particles.
Solar winds then swept away elements, such as hydrogen and helium, leaving only
rocky materials to create worlds like Earth. Earth’s core formed first, with
heavy elements colliding together. Then dense material that was originally
colliding sank to the center due to pressure, while the lighter material stayed
afloat and created the crust. Continuing the creation process, earth’s magnetic
field began shaping around this time as well as its gravity. Then earth’s
gravity proceeded to naturally capture some of the gases that made up the earth’s
early atmosphere. The movement of the tectonic plates was the reason volcanos
discharged gasses into the earth’s atmosphere resulting in the atmosphere
changing. One of the greatest causes for life on earth is water. Water came
about due to collisions with icy meteorites. The specific location of earth
relative to the sun caused the water to remain on earth’s surface and not
evaporate. Throughout this excerpt the constant change of earth’s body, oceans,
and natural life will be examined.
The core the mantle and the crust gives us important
clues about the history of the Earth and other planets. Most geologists believe
that the key forming processes of the Earth was melting of much of the inner
rock material. The foundation of the heat was radioactive minerals trapped in
the Earth as it formed. Gradually, those minerals released heat as radioactive
chemicals. The temperature rose until the rock melted. Once this occurred,
heavy portions flooded downward toward the center, while low-density minerals
floated toward the surface. Eventually, they solidified into a crust of
low-density rock. A great example of a rock that floated to make the crust is feldspar.
The creation of the core is crucial to earth’s formation. During its history,
tectonic plate movement has had a vital role in shaping modern day earth.
million years after the planet’s birth, life giving water surrounds its
surface. And scattered throughout earth are tiny islands. Multan rock bursts
through the earth’s crust and rises through the ocean. Over time, the lava
cools and forms a volcanic island. In due course, the islands will join
together to form a continent. Unfortunately, during this time life was still
impossible due to the scorching heat and atmospheric toxicity. Water continues
to change from experiencing meteoritic falls. These meteors contained minerals
and solutions that as they dissolve release it in the bottom of the ocean. At
the bottom of the ocean there are lava pipes forming and spewing hot liquid.
Sea water seeps down to earth through the cracks and as the water travels down,
it transports minerals and chemicals with it. This process causes the water to
become a chemical mixture that finally creates the first forms of life.
life on Earth began about 3.8 billion years ago, initially with single-celled
organisms, such as bacteria. Life evolved into multicellular organisms over a
billion years later. In the last 570 million years of earth’s life, these organisms
began to evolve, starting with arthropods, followed by fish about 530 million
years ago, then land plants about 475 million years ago and then forests about
385 million years ago. It is reported that mammals didn’t evolve until 200
million years ago and Homo sapiens only 200,000 years ago. So this means that
humans have only been around for about 0.004% of the Earth’s history. This in reference
to the video The Earth through Time created
by National Geographic. These changes are not easily summarized, but
nevertheless it is still incredible how far life on earth has come.
conclusion, earth is a wondrous place where constant change is happening. Even
now, we can see how climate change is affecting our world overall. The fact
that the earth is old and historic, yet changes as time passes, continues to
amaze and challenge scientists. Moving forward, it is understandable that the
earth will change. There is no way to stop this from happening, but we all have
to do our part to preserve what we can, as best as we can for us currently and
for future generations.