What on Earth Is Going on Here

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What on Earth Is Going on Here?

• By Veronica Rodriguez, TeacherHolt Crossing
  Intermediate SchoolGrove City, Ohio

This Powerpoint presentation was downloaded from
Science for Ohio. Click on the icon to visit
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What on EARTH is going on here?

• Earth Make-up
• Continental Drift
• Mechanical Chemical Weathering
• Erosion Deposition

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Once upon a time 4.6 billion years ago, Earth
was born.
4.6 BILLION YEARS AGO!
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As Baby Earth cooled, it settled into three
layers. The denser, hotter core fell to the
middle. Then, the mantle and crust laid down on
top, forming the globe-shaped Earth.
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Call the fire department! The core is burning at
13,000 degrees F!
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When Earth got a little older, its crust was
covered with one big ocean and one
SUPERcontinent! Well, thats what scientists
think Earth looked like.
Im Alfred Wegener, and Im telling you that
Pangaea was real!
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Pangaea broke apart and the seven continents
started drifting. Since the mantle flows slowly,
the continental plates sort of shift around on
top. When you look at the continents, dont they
look like puzzle pieces?
Yep, still movin.
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Earth may not be a baby anymore, but its still
growing, changing, and aging. Weathering is
particularly hard on Earths looks. Weathering
breaks down the lithosphere with
3. Ice
1. Wind
2. Water
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5. Animals
6. and Chemical Change, like acid rain.
4. Plants
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There are two kinds of weathering MECHANICAL,
which breaks down rocks,
and CHEMICAL, which changes rocks into something
new.
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Here are some examples of weathering
Plant roots have grown into the rock, causing
some of it to break away. MECHANICAL OR CHEMICAL
WEATHERING?
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The exposed iron in this rock has started to
oxidize. The iron combines with oxygen in the
air to make rust. MECHANICAL OR CHEMICAL
WEATHERING?
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Once weathering has occurred, then erosion can
take place. Erosion is the process of carrying
away weathered rock. The Grand Canyon is an
excellent example of what erosion can do!
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Deposition is the process of laying weathered
rocks down in a new location. Erosion and
deposition go together like my favorite school
lunch, toasted cheese and tomato soup.
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Over billions of years, Earth has changed
drastically. Life has evolved, continents have
shifted, and the surface has altered. One thing
is for sure, Earth will keep on changing! What
do you think Earth will look like in another 4.6
billion years