Chapter 2- Earth Science (Geography)

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Our planet and our lives are powered by

radiant energy from the Sun

The following about the Sun is true

The Sun produces energy through fusion processes.

Light travels at a speed of approximately

300,000 kilometers per second

The plane of Earth’s orbit about the Sun is called

the plane of the ecliptic

These accurately describes Earth’s distance from the Sun?

-The Earth-Sun distance averages 150 million kilometers -It takes light an average of 8 mins and 20s from the Sun to Earth -Earth is closer to the Sun in Janurary (perihelion) and farther away in July (aphelion)

The Sun produces which of the following?

mainly visible light and infrared energy

The solar wind consists principally of

positively charged hydrogen nuclei and free electrons

Which of the following is NOT true about sunspots?

They are brighter than the rest of the sun’s surface

On its way to Earth, the solar wind first encounters

the magnetosphere

The auroras in the upper atmosphere are caused by

the interaction of the solar wind and atmospheric gases

The dominant wavelength of energy emitted by the Sun is

shorter than that emitted by Earth

The dominant wavelength emitted by Earth is


Intercepted solar radiation is called


The uneven distribution of insolation by latitude is primarily a result of

Earth’s sphericity, which presents varied angles to parallel solar rays

High latitudes receive less energy than the equatorial regions because

-The orientation of Earth’s surface relative to the Sun’s rays diminishes the intensity of solar radiation at high latitudes -The Sun’s rays must pass through more atmosphere at higher latitudes

What is the name of the location on the surface of Earth that receives isolation when the Sun is directly overhead?

North Polar Point

On the northern hemisphere’s summer solstice, the north polar region receives_______ daily insolation than areas nearer the equator because_______.

more; the Sun does not set.

The term "net radiation" refers to

the difference in amount of incoming and outgoing radiation.

Which of the following is true regarding Earth’s axis?

The axis is titled 23.5° from a perpendicular to the plane of the ecliptic.

On June 21, the Sun never sets a Finn’s locations. Based on this, it can concluded that Finn lives.

above the Arctic Circle

Which of the following statements is true?

March 21= equal day and nights everywhere on Earth

The equinox

has 12 hours of day and 12 hours of night for all locations

At the speed of light, Earth is an average of only 8 min. and 20s from the Sun


Earth is at perihelion in early January when it is closest to the Sun.


Earth is farthest from the Sun at perihelion and closest at aphelion


Energy is liberated within the Sun’s interior through a process known as nuclear fusion.


The uneven distribution of insolation at the thermopause is caused by Earth’s curvature, with only the subsolar point receiving sunlight from directly overhead.


All points of Earth’s surface experience the subsolar point at some moment during the year.


Rotation is Earth’s motion on its axis; revolution is its motion about the Sun.


Earth’s axis is tilted 23.5° from a perpendicular to plane of the ecliptic.


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