Exam 15: Place and Time

"Zulu" is the designation for ______________ time.

The four seasons-spring, summer, fall, and winter-are caused by the Sun's changing its daily altitude over a period of 1 year. The Sun's altitude changes

The Sun is at the autumnal equinox on ______________.

It is generally believed that there are 7 days in a week because

On September 22 or 23, the noonday Sun is overhead at what latitude?

At which latitude is the noonday Sun overhead only once a year?

A line of equal latitude is called a(n) ______________.

The most southern latitude from which an observer on Earth can see the North Star (Polaris) is

The number of daylight hours at 35°N is greatest during the month of

The International Date Line in theory is ___________, with variations to accommodate the needs of various countries.

An imaginary line from one geographic pole to the other along the surface of Earth perpendicular to the equator is called

The equator has approximately ______________ hours of daylight every day of the year.

Pope Gregory XIII decreed that 10 days would be skipped in 1582 because

The point in the sky directly above an observer's head is called the ______________.

A(n) ______________ is any circle on the surface of a sphere whose center is at the center of the sphere.

The angle or arc distance of a point on the celestial sphere from the zenith is called the ______________ angle.

______________ is defined as the angular measurement, in degrees, east or west of the Greenwich, or prime, meridian.

The elapsed time between two successive crossings of the same meridian by a star other than the Sun is known as

An observer measures the North Star (Polaris) at an altitude of 70°. The observer's latitude is

In the United States, the southernmost point of the Sun is known as the ______________.