Astr 100 Study guides, Class notes & Summaries
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USASK ASTR 102 Final | 100% Correct Answers | Verified | Latest 2024 Version
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Plants and animals are - two small branches of the diverse "tree of life" on Earth. 
How did oxygen (O2) get into Earth's atmosphere? - It was released by life through the process of 
photosynthesis 
Based on DNA studies, it seems that all life on Earth - shares a common ancestor 
According to fossil evidence how far back in time did life on Earth exist? - about 3.5 billion years or 
more 
Which of the following best describes the predominant scientific view of the origin of life on Earth? - ...
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ASTR 102 exam With Questions & 100% Solutions| A Guaranteed
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Consider a spectroscopic binary star system in which the spectra of both stars are observed. If Star A is 
more massive than Star B, which star has the greater orbital velocity? 
a) Star A 
b) Star B 
c) They both have the same velocity d) The star that is closest to the center of mass 
e) It depends on where they are in their orbits - Consider a spectroscopic binary star system in 
which the spectra of both stars are observed. If Star A is more massive than Star B, which star has the 
greater o...
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Final Exam ASTR 101 Connick / Clemson 100% VERIFIED ANSWERS 2023/2024
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QUESTIONS AND ANSWERS
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ASTR 102 exam 2024| Questions with 100% Solutions| A Rated
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What are the Milky Way Galaxy's spiral arms? - The spiral arms are places where stars are formed 
from clouds of gas and dust 
Where are you in the Universe? If you had to give directions to your location in the Universe, what 
directions would you give? - We are the third planet away from the Sun. Our Solar System is 
located in one of the spiral arms of the Milky Way Galaxy, one within the Local Group of galaxies 
Why do astronomers now label Pluto a "dwarf planet"? - Due to its small size ...
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ASTR 1000 Test 3 Questions With Answers 100% Correct
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ASTR 1000 Test 3 Questions With Answers 100% Correct ASTR 1000 Test 3 Questions With Answers 100% Correct ASTR 1000 Test 3 Questions With Answers 100% Correct ASTR 1000 Test 3 Questions With Answers 100% Correct ASTR 1000 Test 3 Questions With Answers 100% Correct ASTR 1000 Test 3 Questions With Answers 100% Correct ASTR 1000 Test 3 Questions With Answers 100% Correct ASTR 1000 Test 3 Questions With Answers 100% Correct ASTR 1000 Test 3 Questions With Answers 100% Correct ASTR 1000 Test 3 Questi...
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ASTR 102 exam Prep Questions & 100% Solutions| A Guaranteed
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Which of the following statements about light focusing is not true? 
A) In a healthy eye, light is focused on the retina. 
B) Film should be placed at the focal plane in a camera. 
C) If you try to look at an image that is not formed at the focal plane, it will be blurry. 
D) The focal plane of a reflecting telescope is always located within a few inches of the primary mirror. - 
D) The focal plane of a reflecting telescope is always located within a few inches of the primary 
mirror. 
Suppose t...
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ASTR 102 exam Questions & 100% Solutions (Verified Answers)
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D) the same no matter how or where you measure the object's weight. - The mass of an object is 
A) the same as the weight of the object. 
B) larger than the weight of the object. 
C) unrelated to the weight of the object. 
D) the same no matter how or where you measure the object's weight. 
A) halved. - If an object's velocity is halved, its momentum is 
A) halved. 
B) unchanged, 
C) doubled 
D) quadrupled 
E) dependent on its acceleration.
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ASTR 102 Midterm Exam Questions | 100% Correct Answers | Verified | Latest 2024 Version
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The apparent motion of a foreground object relative to a distant background as the observers position 
changes? - Parallax 
When measuring parallax the distance between two observation points is called? - Baseline 
If Earth rotated twice as fast as it currently does, but its motion around the Sun stayed the same, then? 
A. The night would be twice as long 
B. The night would be half as long 
C. The year would be half as long 
D. The length of the day would be unchanged. - B. 
A long, thin cloud ...
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ASTR 102 Midterm 2 | 100% Correct Answers | Verified | Latest 2024 Version
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A star has an apparent brightness of -2 and an absolute brightness of 1. What must be true? 
Select one: 
a. The star is further than 10 parsecs 
b. The star is at 10 parsecs 
c. The star is closer than 10 parsecs 
d. The star is close to exploding - c 
What is special about electromagnetic waves? 
Select one: 
a. We can see all of them 
b. They do not need a medium to travel 
c. They only exist near stars 
d. Each color travels at a different speed - b 
A star that has a smaller absolute bright...
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ASTR 102 Quiz Questions | 100% Correct Answers | Verified | Latest 2024 Version
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We have learned that the centre of the milky way contains a very massive black hole. We developed this 
understanding by: - Monitoring the orbital motions of many individual stars in the very central parts 
of the Milky Way 
If the sun were to be squashed down small enough to become a black hole, then: - The planets in the 
solar system would orbit the Sun in unchanged fashion (but would receive no light from it) 
The first stellar mass black hole identified, Cygnus X-1, was found in 1973. The n...
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