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Inside the Earth

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Inside the Earth What are we walking on? _____Fault Boundary This occurs when _____plates are _____past each other. – PowerPoint PPT presentation

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Title: Inside the Earth


1
Inside the Earth
  • What are we walking on?

2
Earth Layers
  • The Earth is divided into four main layers.
  • __________
  • __________
  • _________
  • _________

3
____________________
  • The Earths crust is like the skin of
    an______________. It is very thin compared to the
    other three layers.
  • The crust makes up ______________of the Earth.
  • The crust of the Earth is broken into many
    pieces called______________.

4
_______________
The crust is only about 3-5 miles (8 kilometers)
thick under the oceans(________________crust) and
about 25 miles (32 kilometers) thick under the
continents (__________________ crust).
5
The Crust
  • Outer layer
  • 5-100 km thick
  • 2 types of crust
  • Oceanic(very______, made of basalt)
  • Continental (less dense, made of_______________)

6
  • Granite/_______ Basalt/__________
  • _

7
___________________
  • The mantle is the layer _____________ the crust.
  • The mantle is the _________________ layer of the
    Earth.
  • The mantle is divided into two regions the upper
    and lower sections.

8
____________________
  • The core of the Earth is like a ball of
    very______________.
  • The outer core is________________.
  • The outer core is made up of __________and is
    very dense.

9
Inner Core
  • The inner core of the Earth has temperatures
    and pressures so great that the metals are
    squeezed together and are not able to move.
  • The inner core is a solid.

10
Earths Layers
  • How are the earths layers similar to an egg?
  • Shell____________
  • Egg white________
  • Yolk____________

11
Physical Structure of the Earth
  • _________________________- rigid outer layer
    (crust)
  • __________________________- solid rock that flows
    slowly (like hot asphalt)

12
_______________
  • The lithosphere (geosphere) is the _________"
    part of Earth. It has ___________parts, the crust
    and the___________________________.
  • The lithosphere _________________ on the
    asthenosphere.
  • The ____________________are the lithosphere.
  • It is the rocky, solid portion of the crust.
    Remember that it is made up of mostly
    _______________( Si) and Oxygen (O).

13
_____________________
  • This is the layer below the lithosphere. This
    layer is __________________________.
  • It is somewhat solid/liquid.
  • You can say that it is___________________.
  • Very important in terms of________________________
    _________.

14
(No Transcript)
15
_________________________
  • Earths crust is broken into about
    ____________pieces
  • These plates move on top of the
    __________________________________

16
Plate Tectonics
  • Plate Boundaries

17
Plate Tectonics
  • In____________, scientist were able to use
    ________________ ___________and sea-floor
    spreading to come up with the idea of
    ______________ _____________________.
  • Plate tectonics is the ________________that the
    Earths ______________and the _______________mantl
    e are __________________into sections
    called__________________.

18
Plate Tectonics
  • With this ____________________scientists
    concluded that _________________move around on
    the_______________ like mantle.
  • How?
  • The lithosphere is __________dense than
    the_______________________, so the lithosphere
    ________________ on the asthenosphere.

19
Plate Tectonics
  • Plate tectonics is caused by the internal heat of
    the Earth
  • ____________________________is the upper levels
    of the mantle that are hot and _______enough to
    permit a plastic flow.
  • ______________heat causes convection flows in
    asthenosphere
  • Molten material from asthenosphere wells up at
    oceanic rifts, producing seafloor spreading, and
    is returned to the asthenosphere in
    _______________________ ______________.
  • As one end of a plate is subducted back into
    the________________, it helps to pull the rest of
    the plate along

20
Plate Tectonics
  • So what does this mean?
  • This means that _________________can move around
    and have the _________________to collide,
    move_______________ from each other.
  • This is what creates_____________________,
    mountains, and_____________________.

21
Types Of Plate Boundaries On Earth
  • There are three types of plate boundaries
  • __________________________________
  • ___________________________________
  • ___________________________________

22
__________________Boundaries
  • The Great Rift Valley in ___________________is a
    good example of a _______________________boundary,
    the valley is formed because 2
    ____________________plates are moving
    _________________ from each other.

23
______________________Boundaries
  • Just like the word says, ___________boundary
    means that the plates are moving ______from each
    other. This is the kind of boundary that we talk
    about with sea-floor spreading.
  • Example the__________________ Plate is moving
    away from the _______________ American plate.
  • What does this mean for the Atlantic ocean?

24
______________Boundaries Examples
  • Sea-Floor Spreading would be a good example of a
    __________________boundary.
  • _________________ is growing everyday, because it
    ______________in the middle of a divergent
    boundary- the mid-________________ ridge.

25
__________________Boundaries
  • ____________________boundaries occur when 2
    plates are__________________.
  • There are________ types of convergent boundaries
  • _______________________________________
  • _______________________________________
  • _______________________________________

26
Ocean-Continental
  • When the ____________________ crust collides with
    ______________________crust

27
Ocean- Continental
  • Because __________________ crust is lighter than
    ______________________crust, oceanic crust will
    create a __________________zone.
  • Meaning the oceanic crust will _______________unde
    rneath the continental crust.
  • This often creates deep ocean trenches and
    ___________________mountains like the
    _________________mountains in Peru and the
    ______________________ in ________________________
    _________.

28
____________-_________________
  • When_____________ oceanic plates collide, the
    _______________ plate will subduct under the
    ______________dense plate.

29
Ocean-Ocean Boundaries
  • Again, a deep sea __________________is formed,
    and _______________magma to rise and form new
    _________________ mountains.
  • The islands of _____________were formed this way.
  • Trenches are formed as well, example the
    ____________________Trench( Pacific Plate
    converging with the Philippine plate).

30
_______________-_____________
  • When ___________ continental plates collide.
    Since both plates are_____________ dense than the
    material in the asthenosphere, _______
    ______________________occurs.

31
Continental-Continental
  • So the_______________ plates meet and
    _____________________ up forming_________________
    ________.
  • Like the __________________mountains in India.
  • They were formed when ________________slammed
    into the __________________plate.

32
How The Himalayans Were Born.
  • Movement Of
  • _______________and Sri Lanka
  • _________________.
  • Slams into the
  • Eurasian Plate

33
Himalayans
  • These_______
  • plates are
  • Still colliding.

34
________________Fault Boundary
  • This occurs when ________________plates are
    ________________past each other.
  • They slide in ___________________ directions or
    in the______________ direction.
  • Example The ______________________in Ca.
  • The ____________________American Plate is
    sliding past the __________________plate.
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