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first ASTRONOMY exam

exam on chapters 1, 2, 3 and Appendix A "here and now" / Textbook: HORIZONS

QuestionAnswer
The astronomical unit is equal to the distance between Earth and the sun
Of the following units of distance measurement, the one that is most convenient in describing distances in the solar system is the astronomical unit.
The light from a galaxy that is 10 billion light-years away has been traveling toward Earth for 10 billion years
Which of the following statements is correct? A. Stars consists of many galaxies B. The milky way galaxy consists of billions of stars C. Stars orbit planets D. The solar system consists of a single planet orbited by eight stars The Milky Way Galaxy consists of billions of stars
At present, astronomers think that the largest structure in the universe is filaments of galaxy superclusters.
The Milky Way Galaxy is about 100,000 light-years in diameter
Scientific notation is used in science because it makes it easy to write big or small numbers
How many centimeters are there in one meter? 100
Between 1979 and 1999, Pluto was closer to the sun than Neptune
The distance that light travels in one year is defined as the Light year
A galaxy consists of Lots of gas, dust and stars
Scientific notation is the method by which large numbers are written as powers of ten
Astronomy attempts to answer which of the following questions? A. How the universe began B. How the solar system formed C. How Earth originated D. All of the above All of the above
The expression 1.65 billion is the same as 1.65 x 109
If light takes 8 minutes to reach Earth from the sun and 5 hours to reach Pluto, what is the distance from the sun to Pluto? 37.5 AU
Galaxies range in diameter from 1,500 to 300,000 ______ light years
The average distance from Earth to the sun is 1 AU
Arrange the following distances in order from smallest to largest. I. kilometer II. light-year III. yard IV. astronomical unit III, I, IV, II
In scientific notation, 38,000 can be written as 3.8 x 10x. What is the value of x? 4
How much time does it take for the light from a star 400 light-years away to reach Earth? 400 years
Of the following units of distance measurements, the one that is most convenient in describing distances between the stars of the Milky Way Galaxy is the light year
Which of the following is a correct representation for 5,000,000? 5.00 x 106
How many centimeters are there in ten meters? 1,000
Astronomy makes use of the scientific disciplines of A. biology B. chemistry C. physics D. geology E. all of the above All of the above
How many centimeters are there in one meter? 100
A waxing crescent moon is visible near the western horizon just after sunset
The waxing phase of the moon occurs when the moon appears to be growing larger with each successive day
The first-quarter moon rises at about noon
The ______________________ moon is visible above the western horizon a couple of hours before sunrise waning gibbous
A totally eclipsed moon glows coppery red because only red light is able to pass completely through Earth’s atmosphere and reach the moon
During a total lunar eclipse the moon's color will be affected by Earth's atmosphere
When the moon is located between Earth and the sun, the phase of the moon is said to be new
The sun is on the celestial equator at the times of the autumnal equinox and the vernal equinox
The period of time required for the moon to go from new to full and then back to new again is called the synodic period
A solar or lunar eclipse will occur when the sun is near the line of nodes of the moon and the moon is new or full
Although Earth is closer to the sun in January than in July, Earth’s seasons depend on the tilt of Earth’s rotation axis with respect to the ecliptic
A “phase” of the moon is determined by the portion of sunlight reflected by the lunar surface toward Earth
As the moon orbits Earth, the moon rotates on its axis once
When the moon is in a "waning" phase, it means the moon appears to be shrinking with each successive day
When the moon is in a "waxing" phase, it means the moon appears to be growing with each successive day
The period of time required for the moon to go from new to full and then back to new again is called the synodic period
During a total lunar eclipse, the moon's color will be affected by Earth's atmosphere
Created by: dirtydan0
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