ASTR 1141|260 Mid SEM Questions Ch. 1-13|With Correct Answers |Download To Score A+|18 Pages

A carbon dioxide concentration of 400 parts per million (ppm) means that carbon dioxide represents ________ of Earth's atmosphere. - ️️less than 0.1% A habitable world is defined to be one that - ️️has conditions suitable for life A star less luminous than our Sun will have a habitable zone that is - ️️narrower and closer to the star than the habitable zone of the Sun A UFO is - ️️an unidentified object seen in the sky A wormhole is a - ️️shortcut between two distant parts of the universe through hyperspace According to current scientific understanding, the idea that the Milky Way might be home to a civilization millions of years more advanced than ours is ________. - ️️one possible solution to Fermi's paradox According to current understanding, outgassing released water and other gases from Earth's interior. How did these gases get trapped in the interior in the first place? - ️️As Earth accreted, planetesimals from colder regions of the solar system brought ices that became trapped gas in the interior. According to modern astronomy, which of the following statements is true? - ️️The same physical laws operate throughout the universe as operate on Earth. According to the leading hypothesis, what role did a magnetic field play in Mars's global climate change? - ️️The magnetic field shielded the atmosphere from the solar wind while it existed, and the atmosphere was lost after the magnetic field weakened. According to the nebular theory for the formation of the solar system, - ️️planets should be rotating in the same direction as they orbit the Sun According to the nebular theory of solar system formation, which law best explains why the solar nebula spun faster as it shrank in size? - ️️The law of conservation of angular momentum According to the nebular theory of solar system formation, which of the following best explains why the solar nebula ended up with a disk shape as it collapsed? - ️️It flattened as a natural consequence of collisions between particles in the nebula.