Exam 1: Introduction to Earth

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Earth's axis is tilted ________ degrees from a line perpendicular to the Plane of the Ecliptic.

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At the Equator (0°), a given point on Earth's surface travels about ________ kilometers per hour.

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The northern hemisphere's vernal equinox occurs on September 23.

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Previous to the 1880s, the United States had more than 20 time zones.

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At one time, several nations had their own separate prime meridians.

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A(n) ________ is a vertical piece of metal on a sundial.

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Draw and label a diagram showing Earth/Sun relationships which cause seasonality; explain the diagram.

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The fact that at any time during the year, the Earth's axis is parallel to its orientation at all other times is called its parallelism, or ________.

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In the Northern Hemisphere, days become continually shorter after March 22.

(True/False)
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Time zones are universally divided into zones of 24° longitude.

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The Prime Meridian was adopted as a result of an international conference in 1884.

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The best scientific guess is that there are a few hundred suns in our galaxy.

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________ is the deepest spot in the ocean.

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The cause of Earth's seasons is the

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The geographic grid line 180 degrees of longitude from the Prime Meridian is the ________.

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The network of intersecting parallels and meridians over the entire Earth is known as the ________ .

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The perihelion is during the month of

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Magellan's expedition--the first to go around the world--found that their log was incorrect by one day. This was because the world had yet to adopt the International Date Line.

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When the circle of illumination just touches the Arctic Circle and the North Pole is dark, the date is closest to

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The Plane of the Ecliptic is the same thing as the perihelion.

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