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Astronomy Final Exam 1
Terms in this set (49)
What do we mean in astronomy by the term "horizon"?
An imaginary plan that extends from your observing location and Earth out to the stars
How long does it take for light to travel from the Sun to Earth?
An Astronomical Unit (A.U.) is the mean distance between what?
Earth and the Sun
Who proposed a sun-centered solar system first?
Aristarchus of Samos before 200 BC
What is true about the laws of physics when we move to different places in our universe?
they are the same
Which of the following is the largest? the orbit of our moon, the sun, the earth, our solar system, the milky way
The Milky Way
The remark that we are "made of stardust" relates to
the elements we are made of were formed in the core of a star
What concerned Galileo during his arguments with the Roman Catholic Church in the 17th century?
That by using the Bible to try to prove something isn't true that may be true, one cast doubt on the truthfulness of the Bible if it turns out that whatever under discussion turns out to be true
During the fall equinox where should we look for the sun to rise?
directly east of us
The fact that the shadow of the Earth during a lunar eclipse is always a circle is one thing that allows us to conclude that
the Earth is a sphere
If you were able to measure how long it took a planet to go around the Sun, what would Kepler's 3rd Law tell you?
How far away the planet was from the Sun
Stars that never rise or set, but are always above the horizon are called ________ stars
If I see a new moon one night, how long do I have to wait to see a full moon?
about 2 weeks
The point directly above your head is called your what?
Which statement below most accurately describes modern constellations?
They are 88 well defined regions on the celestial sphere
An object at rest will remain at rest and an object in motion will remain in motion unless acted on by a force is one of _________laws
Where on Earth can you stand and, over the course of a year, see the entire sky?
at the equator
The study, evaluation, and trying to make models to predict the nature and effects of global climate change that have some basis on effects we know to be real, such as the Melankovitch cycles are difficult and the people to listen to describe these models, along with their strengths and weaknesses you are most likely to get the correct answers from
scientists who are repeatedly testing their models against observations
if you see the Moon rising as the Sun is setting, what phase must the Moon be closest to?
Which of the following is the most important for a theory to possess?
It makes predictions that had not been observed, and then when these are looked for, they are seen to be correct
The observed position of ___________ location in our sky defines the ecliptic plane
What is the primary language of science that is the difference between the empirical model and true scientific one?
What was the exact center of Ptolemy's Earth-centered model of the solar system?
True of False? The nearest star to Earth is about 5 times farther away from us than Neptune
During a lunar eclipse, what is the correct ordering of the Earth, Sun and Moon?
Sun, Earth, Moon
What is the greatest strength of the scientific method?
even ideas established for hundreds of years are under constant study and being challenged by the scientific method
What is the major cause of the Earth's seasons?
The Earth is tilted 23.5 degrees on its axis with respect to the ecliptic plane
In scientific notation 123,400 equals
1.234 x 10^5
A car is turning around in a circle at 60 km/hr. This means its velocity is
The Sun is part of
The solar system, the milky way, and the universe
Do we have pictures showing USA astronauts footprints on the moon?
Keplers 1st law gives that planets move in _________ orbits around the Sun
Who first measured the circumference of the earth?
Eratosthenes before 200 BC
What reasons do we know that Copernicus' work on the sun-centered solar system was not a problem for the catholic church?
all of the above
the told of Jupiters rotational axis is only 3 degrees. If the earth had the same told what would be true about its seasons?
they would be less extreme
If you were standing at the Earths North Pole, where would you see the north celestial pole?
at your zenith
a baseball is hit with a bat causing the ball to travel 75 meters. Which one experiences the most force?
neither, the force is the same
Which days of the year do we have 12 hours of light and darkness?
fall and spring equinox
We always see the same side of the moon because
the moon rotates once each time it orbits the earth
what book did galileo want to use in his defense of his belief
what is true about the speed of a planet's rotation about the sun?
its speed increases as it nears the sun
Which type of day refers to how long it actually takes the earth to rotate once around its axis?
Where in the sky will you find the planets
near or on the ecliptic
the equator of the celestial sphere is located directly above the
All of the following statements are true. Which one explains the reason that there is not a solar eclipse at every new moon?
the orbital plane of the moon is tilted slightly to the ecliptic plane
the greeks and other early astronomers thought the earth was
One of the most important things that a scientific model must do is to make predictions that are
Will the earth's rotational axis always point at the star Poalris in the future?
Are the orbits of the planets equally spaced from the sun?
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