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50 Cards in this Set
- Front
- Back
_____ is a word that means firmly established; not changing, moving, or fluctuating.
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Stable
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______ means supplied or brightened with light.
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Illuminated
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Earth can be called a "spaceship" because it is like a vehicle carrying humans and other cargo through space.
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True
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Earth's only motions are to rotate about its axis and to orbit around the sun.
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False
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Earth appears very fixed and stable, but it is not.
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True
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The regular motions of the earth help support and sustain life.
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True
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Viewed from space, earth appears as a large sphere.
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True
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The earth is perfectly round.
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False
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At the poles, earth is about 790 miles in diameter.
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False
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The atmosphere of the earth extends to about 1,000 miles beyond the surface.
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True
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The earth _____ on its axis.
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Rotates
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The solar day is the time that the earth takes to make one complete revolution around the sun.
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False
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The earth appears to rise in the east and set in the west.
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True
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A day and night are always of equal time at the equator.
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True
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How long does it take the earth to make one complete rotation?
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24 hours
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The length of days and nights change with the seasons.
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True
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The tilt of the earths axis is ____
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23 1/2
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______ is an imaginary line running in a circle around the earth through the poles.
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A Meridian
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______ is the distance in degrees measured east or west of the prime meridian; expressed either in degrees or in time.
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Longitude
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The ancient Jews began their day at ________
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Sunset
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Today, most places have adopted the practice of beginning the new day at ______.
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Midnight
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In the military services, 6:00 would be written as 1800.
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True
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A circle surrounding the earth at the equator would consist of ________ "degrees" of angular measurement.
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360
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The division of the earth's surface into twenty-four time zones is called _____________.
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Standard time
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The zero degrees meridian is known as the _______.
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Prime Meridian
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The calendar day starts at the_________.
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International Date Line
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In the continental United States, There are ____ time zones.
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4
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The calendar day changes when a new day begins at _____.
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180 degrees
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On or about September 22, when the days and nights are equal.
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Autumnal equinox
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An egg-shaped orbit of heavenly body.
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Ellipse
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One billions of heavenly systems consisting of numerous stars; an example is the Milky Way.
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Galaxy
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The curved pathway of a heavenly body through space.
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Orbit
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The spring equinox, on about March 21, when days and nights are of equal length.
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Vernal equinox
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Everything in space moves except the sun.
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False
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When it is sunny at the North Pole, it is dark at the South Pole.
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True
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One daylight period at the South Pole lasts twenty-four hours.
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False
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The shape of the earth's orbit is a(n) ______.
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Ellipse
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The orbits of all planets, including the earth, are ellipses.
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True
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Earths orbit may be explained by Newton's Law of Gravitation and Newton's Law of ______.
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Inertia
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Newton's Law of inertia is sufficient to cause a planet to orbit the sun.
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False
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In order for any satellite or spaceship to orbit the sun, it must be given an initial_______.
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Velocity
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What would happen to a planet if it stopped its orbit around the sun?
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It would crash into the sun.
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Current modern scientific theories can adequately explain the origin of the planets and their orbits.
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False
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By how much does the earth-Sun distance change?
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3,000,000 miles
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The word equinox means _______.
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Equal nights
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After the autumnal equinox, the days become shorter in the northern hemisphere.
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True
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On both equinoxes, the days and nights are equal all over the earth.
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True
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The days and nights are always of equal time throughout the year at the equator.
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True
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The longest day of the year in the southern hemisphere is ______.
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December 21
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Evidence which indicates that the Earth rotates is the _______.
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Seasonal weather changes
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