Astronomy Questions PDF

What practical value did astronomy offer to ancient civilizations?​ Answer: It helped them keep track of time and seasons, and it was used by some cultures for navigation. Scientific thinking is _________.​ Answer: Based on everyday ideas of observation and trial-and-error experiments. The names of...

What practical value did astronomy offer to ancient civilizations?​ Answer: It helped them keep track of time and seasons, and it was used by some cultures for navigation. Scientific thinking is _________.​ Answer: Based on everyday ideas of observation and trial-and-error experiments. The names of the 7 days of the week are based on _________.​ Answer: The seven naked-eye objects that appear to move among the constellations. The fact that the lunar phases repeat on the same solar dates about every 19 years (the Metonic cycle) can be used to ________.​ Answer: Keep lunar calendars approximately synchronized with solar calendars. Ptolemy was important in the history of astronomy because he _________.​ Answer: Developed a model of the solar system that made sufficiently accurate predictions of planetary positions to remain in use for many centuries. The ancient Greeks get a lot of attention for their contributions to science because _________.​ Answer: They were the first people known to try to explain nature with models based on reason and mathematics, without resort to the supernatural. What do we mean by a geocentric model of the universe?​ Answer: A model designed to explain what we see in the sky while having the Earth located in the center of the universe. What was the Ptolemaic model?​ Answer: An Earth-centered model of planetary motion published by Ptolemy. The great contribution of Nicholas Copernicus was to _________.​ Answer: Create a detailed model of our solar system with the Sun rather than Earth at the center. The great contribution of Tycho Brahe was to _________.​ Answer: Observe planetary positions with sufficient accuracy so that Kepler could later use the data to discover the laws of planetary motion. Which of the following was not observed by Galileo?​ Answer: Stellar parallax. Which of the following statements about an ellipse is not true?​ Answer: The focus of an ellipse is always located precisely at the center of the ellipse. Which of the following is not one of, nor a direct consequence of, Kepler’s Laws?​ Answer: The force of attraction between any two objects decreases with the square of the distance between their centers. Scientific models are used to _________.​ Answer: Make specific predictions that can be tested through observations or experiments. Which of the following claims can be tested by scientific means?​ Answer: People born when the Sun appears in the constellation Leo have larger average incomes than other people. In science, a broad idea that has been repeatedly verified so as to give scientists great confidence that it represents reality is called _________.​ Answer: A theory.