Transcript Day_5_Earth Properties_Part_Ix

Earth Properties
Part I
Focus Question:
• What makes the Earth unique as a planet?
Spheres of the Earth
• Atmosphere – gases above Earth’s
surface, (Nitrogen = 78%, Oxygen =
21%)
• Hydrosphere – layer of liquid water, 70%
of Earth’s surface
• Lithosphere (Crust) – layer of rock that
forms outer shell of the Earth’s interior
Shape: The Earth is Irregular
• Slightly flattened at the poles
• Equator bulges
• Southern Hemisphere slightly larger
than Northern Hemisphere
The Earth is Irregular
Not perfectly round due to:
– Distortion due to the Earth’s rotation
– Small irregularities on the surface such
as mountains, basins, etc.
– Irregularities due to variations in gravity
The Earth Has
Layers
Question: How
do we know?
Layers:
1) Solid Iron/Nickel Inner Core
2) Liquid Iron/Nickel Outer Core
3) Mantle (Magma)
4) Athenosphere (Plasticity)
5) Crust
Earth has a Magnetic Field
(North and South Pole)
10
Source of the
Geomagnetic Field =
Iron/Nickel Core + Spinning
Earth
11
Auroras = Solar Wind +
Magnetic Field
Gravity
 Depends
on 2 object’s masses and how
far apart they are.
 Question: What is the difference
between Mass and Weight?
Satellites
Two Types of Orbit
• Geosynchronous =revolve around the earth
at the same speed as the earth rotates (Stay
in same position)
• Polar = Remain over the poles
• Uses = TV, Cell Phones, GPS, Weather Data
Classical satellite systems
Inter Satellite Link
(ISL)
Mobile User
Link (MUL)
Gateway Link
(GWL)
MUL
GWL
small cells
(spotbeams)
base station
or gateway
footprint
ISDN
PSTN: Public Switched
Telephone Network
PSTN
User data
Picture from [1]
GSM
Review Questions:
• What 2 gases are in the Atmosphere?
• What is the Earth’s shape and why?
• What are the layers of Earth?
• What is an Aurora?
• What is the difference between mass and
weight?
• What are the 2 types of satellite orbits?
• Why are satellites important?
Extra Video-Understanding
Magnetism/Discovery Ed.
• http://app.discoveryeducation.com/player/
view/assetGuid/E499CFF3-33BF-4F4D8DA8-6E8C19634713
CE Questions
• Which describes the material that makes
up the earth’s asthenosphere?
A) A rigid solid
B) A solid that is able to flow
C) A liquid at high temperature
D)A gas under great pressure
CE Questions
• Which describes the material that makes
up the earth’s asthenosphere?
A) A rigid solid
B) A solid that is able to flow
C) A liquid at high temperature
D)A gas under great pressure
CE Questions
• Which zone of earth is made of liquid
iron?
A) Athenosphere
B) Outer Core
C) Crust
D)Inner Core
CE Questions
• Which zone of earth is made of liquid
iron?
A) Athenosphere
B) Outer Core
C) Crust
D)Inner Core
CE Questions
• The source of the earth’s magnetic field is
the:
A) Core
B) Magnetosphere
C) Crust
D)North Pole
CE Questions
• The source of the earth’s magnetic field is
the:
A) Core
B) Magnetosphere
C) Crust
D)North Pole
CE Questions
• The force of gravity between two massive
objects will increase if the objects are:
A) At rest
B) Closer together
C) In Motion
D)Farther apart
CE Questions
• The force of gravity between two massive
objects will increase if the objects are:
A) At rest
B) Closer together
C) In Motion
D)Farther apart