SPHERES
Which best indicates the exact shape Earth?
((3)very slightly flattened at the poles
As a person travels due west, the altitude of the poie star (Polaris) will
(3.)remain the same
Approximately what percent of the Earth's radius is represented by the crust?
) less than 1%
Trapopause=
12km or 7 mi
What do the temperature at the surface of the earth?
15 degrees
What is the approximate percent by mass of silicon in Earth's crust?
30%
Stratopause
31 miles or 50 km
Chemical composition of water H2O
33 percent oxygen and 66 percent hydrosphere
What is the approximate elevation of the stratopause?
50 km
mesopause=
50 mi/80 km
Earth is composed of
A series or spheres held together by gravity and thus arranged from high density to low denstiy
At the equator, polaris is
At the horizon at 0 degrees and soemtimes cannot be seen
Interface
Boundary between two things
In which sphere would a hurricane occur?
Datmosphere
Atmosphere is divided into
Different layers based on the temp. The lowest layer of the atmosphere is the troposphere
At the noth pole, polaris is
Directly ober heat at 90 degrees
Compare the Earth's equatorial circumference with its polar circumference.
Earths equatorial circumference is 67 km greater than earths polar circumference
The altitude of polaris is
Equal to the latitufe for any observer in the northern hemisphere
How would you draw a cross section or a picture of the earth to represent its shape?
Flattened at the poles ond bulging at the equator
Atmosphere
Gases: air that sureounds the entire earth snd some suspended particles. 21% oxygen and 78% nitrogen and 1% orher trace elements
The north star cannot be seen
In the Southern Hemisphere
Which statement is true about the shape of the earth?
It is larger in circumference along the equator
Hydrosphere
Liquid water.
In which sphere would an earthquake occur?
Lithosphere
The weight for any object changes slightly due to
Location ans gravity
What do gravity measurements teach us about the earth's shape?
More gravatational pull at the poles. Poles are closer to the center of the earth. And The earth is not a perfect sphere
The altitude of polaris increases
Northward and decreases southward
The earths shape is actually a
Oblate spheroid
Which of the following observations is the best evidence that Earth is round?
Observers at dif- ferent places on Earth see the sun in differ- ent parts of the sky.
Water vapor
Only found within the troposphere because in the troposphere it is the only sphere containing life
Evidence of Earths spherical shape
Photographs taken from outer space. When ship sails farther away from you, the ship appears to sync. When a lunar eclipse occurs. We see the changing of the position of the sun and stars as we move great distance on earth
Measurements taken with gravity meters would be most useful in providing information concerning the
Shape of the earth
Lithosphere
Solid portion if earth solid. Most dense. 100 km thick. Divided into lithospheric plates. The part of the litbosphere is called the crust. Oxygen and silicon
What is the earth's shape? Explain.
The earth It's almost a perfect sphere. It is an oblate steroid which means it is slightly flat at the polls and wider at the equator
Oblate spheroid
The earth is slightly flattened at teh poles and bulgind ar the equator about 40 kilometers
The closer an object is to the center of the Earth,
The greater the weight and gravity of that object will be
1. The north-south distance between the Earth's Equator (0) and the North Pole (90° N is 10,002 kilometers. The distance between 0° and 10 N is 1,106 kilometers. Which statement is best supported by this information?
The shape of the Earth is not perfectly spherical.
If could travel upward from the middle you of the stratosphere to the middle of the mesosphere, how would the air temperature change?
The temperature would increase and then decrease.
The atmosphere is layered into zones. These layers are classified by
Vertical tempersture trends
Which of the following is the most accurate model of the earth's shape?
basketball
As altitude increases, pressure
decreases
As altitude increases, water vapor
decreases
Which of the following gives the spheres of the earth in order of increasing thickness?
hydrosphere, lithosphere, atmosphere
The layer of bedrock near the earths surface that forms a continuous shell around the earth is called the
lithosphere
This graph shows properties of Earth's
lithosphere
Which sphere is most dense?
lithosphere
Where in Earth's atmosphere is the air tem- perature generally the lowest?
mesopause
The polar circumference of the Earth is 40,008 kilometers. What is the equatorial circumference?
more 40,076 km
The best evidence of the Earth's nearly spherical shape is obtained through
photographs of the Earth from an orbiting satellite
According to the data below, what is the exact shape of the Earth?
slightly flattened at the Poles and silightly bulging at the Equator
In what layer is most of the mass of Earth's atmosphere?
troposphere
Nearly all the water vaporin Earth's atmos- phere is located in the
troposphere
The greatest atmospheric pressure occurs in the
troposphere
Earth's troposphere, hydrosphere, and lithosphere contain relatively large amounts of which element?
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