LUOA Earth Science Module 9 Questions and Answers Graded A+

LUOA Earth Science Module 9 Questions and Answers Graded A+ Newton discovered that the gravity of a planet _________________ as the planet approaches the sun causing the planet to move ____________ around the sun in that part of its orbit. increased, faster Newton discovered that if two planetary objects moved twice as far from each other ______________________. their gravity reduced by 1/4th Explain Kepler's 2nd law of planetary motion, also known as the Law of Areas. Kepler's 2nd law of planetary motion states that on either sweep side of an ellipse, they both equal the same amount. In an elliptical orbit, the sun ________________________. is at one of the foci Who developed the geocentric model? Ptolemy When the planet orbits the sun it is an elliptical path. At the farthest point away from the sun, the planet is at its ____________________. aphelion Who developed the heliocentric model? Copernicus When the planet orbits the sun it is an elliptical path. At its closest point from the sun, the planet is at its ____________________. perihelion Newton was the first one to explain that tides are caused by _______________________. (Choose the BEST answer) the gravitational pull of both the moon and the sun What is an astronomical unit or AU? the distance between the Earth and Sun What scientist was able to decipher and describe the movement of the planets? Kepler If you are standing at the North Pole how do the star trails appear to move over time? in a circle around and above you In which way does the Big Dipper move over the North Pole? around in a circle overhead Where would you be standing if you took this picture of the star trails? The north pole Polaris: (Select all that apply): Also known as North Star,Located almost directly over north pole,All other stars rotate around The _____________________ is where the sky and the earth meet 360 degrees around the observer. celestial horizon The constellations move ________________ per hour. 15 degrees Describe retrograde motion. Retrograde motion is the illusion that the planets loop and change direction due to their appearance in relationship to an observer on Earth. It is caused by the earth's passing the slower moving outer planets. A reflecting telescope _______________________. uses a series of mirrors According to star animation, If you are at the equator, what 2 major stars/constellations do you see in the sky to the north and south? Polaris and the Southern Cross A refracting telescope _______________________. focuses at a particular focal point If the sun was an empty ball you could put _____________________ earths in it. 1,000,000 Which day of Creation did God create the Sun? fourth What