Class q ch03

The sun moves ,[object Object],[object Object],[object Object],[object Object],[object Object]

The diagram shows three approximate locations of the setting sun along the western horizon. Which number indicates the location of the sun at sunset on December 21 (winter sun) for an observer at a latitude of 48° North of the equator? ,[object Object],[object Object],[object Object],[object Object],[object Object]

Northern Hemisphere winters are colder than Northern Hemisphere summers because ,[object Object],[object Object],[object Object],[object Object],[object Object]

The sun is on the celestial equator at the times of the ,[object Object],[object Object],[object Object],[object Object],[object Object]

The ecliptic is ,[object Object],[object Object],[object Object],[object Object],[object Object]

The observed amount of difference between the perihelion of Earth in early January and aphelion in early July results in the northern hemisphere being _____ ,[object Object],[object Object],[object Object],[object Object],[object Object]

A(n) ____ is a set of beliefs that appears to be based on scientific ideas, but which fails to obey the most basic rules of science. ,[object Object],[object Object],[object Object],[object Object],[object Object]

The point in Earth's orbit where Earth is farthest from the sun is known as ,[object Object],[object Object],[object Object],[object Object],[object Object]

____ is the point in Earth's orbit where Earth is closest to the sun. ,[object Object],[object Object],[object Object],[object Object],[object Object]

The planet(s) of our solar system that are usually or never visible to the naked eye are ,[object Object],[object Object],[object Object],[object Object],[object Object]

On the vernal equinox the Sun is ,[object Object],[object Object],[object Object],[object Object],[object Object]

On the autumnal equinox the sun is ,[object Object],[object Object],[object Object],[object Object],[object Object]

A solar eclipse may occur ,[object Object],[object Object],[object Object],[object Object]

A lunar eclipse may occur ,[object Object],[object Object],[object Object],[object Object]

A solar or lunar eclipse may occur when the line of nodes (intersection of orbit planes of the Moon around the Earth and the orbit plane of the Earth around the Sun) ,[object Object],[object Object],[object Object]

An eclipse season is the period of time during which the ,[object Object],[object Object],[object Object],[object Object],[object Object]

The ____ of the moon is the period of time for the moon to complete a cycle of the lunar phases and is approximately 29.5 days long. ,[object Object],[object Object],[object Object],[object Object],[object Object]

The sidereal period of the moon ,[object Object],[object Object],[object Object],[object Object],[object Object]

The synodic period of the moon ,[object Object],[object Object],[object Object],[object Object],[object Object]

A solar eclipse that occurs when the moon's umbra does not reach Earth's surface is called ,[object Object],[object Object],[object Object],[object Object],[object Object]

A solar eclipse that occurs when the moon's umbra reaches Earth's surface is called ,[object Object],[object Object],[object Object],[object Object],[object Object]

A lunar eclipse that occurs when the moon moves completely into Earth's umbral shadow is called ,[object Object],[object Object],[object Object],[object Object],[object Object]

The saros cycle ,[object Object],[object Object],[object Object],[object Object],[object Object]

The ____ moon is visible above the western horizon a couple of hours before sunrise. ,[object Object],[object Object],[object Object],[object Object],[object Object]

The ____ moon is visible above the eastern horizon a couple of hours before sunrise. ,[object Object],[object Object],[object Object],[object Object],[object Object]

A waxing crescent moon is visible ,[object Object],[object Object],[object Object],[object Object],[object Object]

A third quarter moon is visible ,[object Object],[object Object],[object Object],[object Object],[object Object]

Relative to the stars, the moon moves about ____ eastward in the sky each night. ,[object Object],[object Object],[object Object],[object Object],[object Object]

During a total lunar eclipse, ,[object Object],[object Object],[object Object],[object Object],[object Object]

A totally eclipsed moon glows coppery red because ,[object Object],[object Object],[object Object],[object Object],[object Object]

Typically, the new moon's shadow _______ a solar eclipse ,[object Object],[object Object],[object Object],[object Object],[object Object]

A total lunar eclipse is ,[object Object],[object Object],[object Object],[object Object],[object Object]

The first quarter moon rises ,[object Object],[object Object],[object Object],[object Object],[object Object]

Total lunar eclipses always occur ,[object Object],[object Object],[object Object],[object Object],[object Object]

During a total lunar eclipse, which of the following are true? I. The photosphere of the sun is obscured by the moon. II. The moon is in Earth's umbra. III. The moon is new. IV. The moon is full. ,[object Object],[object Object],[object Object],[object Object],[object Object]

At sunset, the ____ moon phase will be highest above the southern horizon for an observer in the Northern Hemisphere? ,[object Object],[object Object],[object Object],[object Object],[object Object]

The moon has an angular diameter of 0.5°. What is the moon's angular diameter in minutes of arc? ,[object Object],[object Object],[object Object],[object Object],[object Object]

A total solar eclipse occurred in Wolf Point, Montana, on Feb. 26, 1979. When was (will) an eclipse like this eclipse next be visible again in Montana? Hint: A Saros is 18 years and 11 1/3 days. Twice a Saros is 36 years 22 2/3 days. Three times a Saros is 56 years 34 days. So the best choice answer of these listed will be late ,[object Object],[object Object],[object Object],[object Object],[object Object]

Assume all else is unchanged but the Earth's rotational axis is perpendicular to the ecliptic. As a result, seasonal variations on the Earth would ,[object Object],[object Object],[object Object],[object Object]

Assume you lived on the Moon and noticed the Earth high in the sky. From that location, how often would the Earth set below your horizon? ,[object Object],[object Object],[object Object],[object Object],[object Object]

If the plane of the Earth's equator were not tilted with respect to the ecliptic plane ,[object Object],[object Object],[object Object],[object Object]

The phase of the Moon on a particular night is determined by ,[object Object],[object Object],[object Object],[object Object],[object Object]

On a clear night when an observer in Los Angeles sees a first quarter Moon, an observer in London would see ,[object Object],[object Object],[object Object],[object Object],[object Object]

If the Moon's orbital plane was aligned with the celestial equator we could ,[object Object],[object Object],[object Object],[object Object]

Earth doesn't experience a solar eclipse every month because ,[object Object],[object Object],[object Object],[object Object],[object Object]

The Moon's angular diameter in our sky as observed from the earth is measured to be 0.5°. From this, we can find the diameter of the moon in kilometers if we also know the moon’s ,[object Object],[object Object],[object Object]

The ecliptic can be defined as ,[object Object],[object Object],[object Object],[object Object]

The lowest amount of solar energy per square meter is incident upon the surface of Earth in the northern hemisphere on or about ,[object Object],[object Object],[object Object],[object Object]

Full Moon always occurs ,[object Object],[object Object],[object Object],[object Object]

In which direction does the daily motion of the Moon occur in the sky, against the background stars, when viewed from the Earth? ,[object Object],[object Object],[object Object],[object Object]

If the Sun passes directly overhead on at least one day per year, then ,[object Object],[object Object],[object Object],[object Object]

In Brazil, the longest period of daylight and the start of summer occurs during the month of ,[object Object],[object Object],[object Object],[object Object]

The third quarter moon rises at noon. ,[object Object],[object Object]

During an annular eclipse of the sun, the corona of the sun is visible. ,[object Object],[object Object]

The path of totality for a solar eclipse is swept out by the tip of the moon's umbra as the umbra moves over Earth. ,[object Object],[object Object]

A total lunar eclipse is visible only from the path of totality. ,[object Object],[object Object]

If you were on the moon during a total lunar eclipse, the sun would be hidden behind Earth. ,[object Object],[object Object]

The totally eclipsed moon glows coppery red because sunlight reaches the moon's surface after passing through Earth's atmosphere. ,[object Object],[object Object]

An eclipse season is the interval during which the sun crosses a node of the moon's orbit. ,[object Object],[object Object]

The umbra of the moon's shadow is the region from which no part of the photosphere is visible. ,[object Object],[object Object]

The moon and visible planets are always within a few degrees of the ecliptic. ,[object Object],[object Object]

Precession of Earth's axis causes the date at which perihelion of Earth's orbit occurs to slowly change. ,[object Object],[object Object]

Polaris has always been the star nearest the north celestial pole. ,[object Object],[object Object]

The seasons are caused by the precession of the Earth's axis. ,[object Object],[object Object]

A lunar eclipse can only occur during the full phase. ,[object Object],[object Object]

Class q ch03

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Class q ch03