Download Earth`s Interior Zones powerpowerpoint

Earth’s Interior Zones
You have one minute to list
everything you know about
the Earth.
The Basics
How much water covers
Earth’s Surface?
Liquid water covers 71%of
the surface
What gases make up Earth’s
atmosphere?
Earth has an atmosphere with
mostly Nitrogen and oxygen
What makes Earth different
than any other planet in our
solar system?
Earth Supports Life
How old is Earth?
Earth is 4.6 billion
years old
What shape is the Earth?
Not a sphere; an oblate spheroid
(circumference is greater at the equator
than at the poles)
Average circumference 40,000 km
Have scientists physically explored Earth’s
interior?
Scientists have only drilled in the upper
3km of the crust, they have not been to
the middle or core
How do scientists know the layers of
the Earth?
How do scientists know the layers of
the Earth?
• They have come to this conclusion based on
the movement of seismic waves
(Earthquakes).
• Seismic waves move differently through
different materials.
• More on this later!
What are the compositional zones?
3 Compositional zones (As determined by
seismic waves)
1. Crust – solid, outermost layer of the Earth;
rock (2 types: continental and oceanic)
2. Mantle – 2/3 of Earth’s mass, magma is
formed
3. Core – center of the Earth, made of iron and
nickel
But 5 structural Zones
1. Lithosphere – crust and upper mantle (tectonic
plates)
2. Asthenosphere – plastic part of mantle plates
move on
3. Mesosphere – majority of the mantle
4. Outer core – liquid iron core probably the source
of Earth’s magnetosphere (North and South
Poles)
5. Inner core – solid center of Earth
What is the difference between
compositional and structural layers?
Structural
Compositional
What is gravity?
What is gravity?
• The attraction of an object to another object.
What is Isaac Newton’s Law of
Gravitation?
Law of gravitation (Isaac Newton) – The force of
attraction between two objects depends on the
masses and the distance between the objects
What effect does mass have on
gravitational force?
• The greater the mass of an object,
the greater the gravitational pull.
What effect does distance have on
gravitational force?
• The greater the distance is between
the objects, the less the gravitational
pull .
What’s the difference between weight
and mass?
• Weight – the measure of the strength of the
pull of gravity on an object. SI unit is the
newton (n)
• Mass – how much matter is in an object
• An object’s mass will not change from place to
place, the weight will.
Summary
• Summarize each page of notes.
• Paraphrase your answers to the left side
questions.
• Then, glue to page 22 and 23