Transcript Earth Science

Earth Science
Purpose: Study the origin,
composition, and history of the
Earth. Discover how the history of
the Earth relates to the origin of
life on this planet.
Do Now
 Answer
the following in a
paragraph:
–Where did the Earth come
from?
–How old is the Earth?
–What is the Earth made of?
What will we be studying?
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Over the next few months we will
study a variety of topics.
We will discover where the Earth came
from.
We will learn what the Earth is made
up of.
We will learn how the Earth and life on
this planet are related.
Earth’s Story
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Close your eyes. I am going to read
you a story. Try to picture the events
in your mind as I read you this story.
Read page 37 on your own. As you
read take notes on the major events
that occurred during Earth’s formation.
The Formation of Earth
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Over billions of years gravity pulls together
a cloud of hot gases and dust. The cloud
condenses into a giant sphere of matter. A
planet forms.
Particles clump together. Larger and larger
clumps form, colliding into each other with
greater and greater force. These collisions
release massive amounts of energy, in the
form of heat, light, and sound. Resulting in
a mass of molten rock.
The Formation of Earth
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Slowly the planet cools. A solid crust forms,
but the interior remains extremely hot.
The molten rock inside creates great
pressure. The pressure must be released,
so Volcanoes develop across the Earth’s
surface.
Constant eruptions form a poisonous
atmosphere.
The Formation of Earth
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200 million years pass.
Liquid water collects on the Earth’s surface.
Planet wide oceans form.
300 million years later living things develop
in these oceans.
Life evolves and changes over the next 3.5
billion years.
One day a very special living thing arises, a
life form called humans.
Spheres within spheres.
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The Earth is made up of three main parts:
Lithosphere: Topmost solid part of the Earth,
which is composed of the crust and some of
the mantle.
Hydrosphere: Part of the Earth’s surface
consisting of water.
Atmosphere: A mixture of gases that
surrounds the Earth.