Astr 1514 - Study guides, Class notes & Summaries

A protostar's evolutionary "track" in the H-R diagram traces out - ️️how the protostar's luminosity and temperature change with time. A star's position in the H-R diagram is determined by its - ️️temperature and size. As a star becomes a red giant, how does it move on the HR diagram? - ️️upward and to the right Because angular momentum must be conserved, as a gas cloud contracts due to gravity it will also - ️️spin faster. Binary star systems are extremely useful in stud...

planet must pass directly in front of the star - correct answer Detecting a planet around another star using the transit method is difficult because the The terrestrial planets did not grow massive enough to hold on to those gases before the solar winds blew them out of the disk. - correct answer Why did the giant planets accrete so much hydrogen and helium, while the terrestrial planets did not? ...

In the simplest form of the scientific method, which of the following correctly describes the sequence in which it proceeds? - correct answer Observation, hypothesis, experiment Scientists refer to a well-developed model that has been tested many times in many different ways as a: - correct answer law. Pseudoscience refers to: - correct answer a belie...

Which of the following is correct scientific notation for 1.5 million? - correct answer 1.5 x 10^6 Your cousin lives 10 km away from you. Your grandmother lives a distance away that is 3 orders of magnitude larger. How far away does your grandmother live? - correct answer 10000 km Scientific theories can never be changed for any reason - correct answer ...

What causes earth's seasons? - correct answer amount of direct sunlight changing over a year, sun's altitude varying over a year. what time does a full moon rise? - correct answer sunset what causes the phases of the moon? - correct answer different amount of illuminated portion of the moon visible from earth. why do you see only certain constell...