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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