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unit 2 astronomy
mr. arnhold
| Question | Answer |
|---|---|
| When a Foucault Pendulum swings throughout the day it appears to change position due to what? | The Earth's rotation |
| What is the Coriolis Effect? | Objects that aren't firmly connected to the ground which move perpendicular to the direction they are moving |
| How long does it take Earth to make one rotation on its axis? | 24 hours |
| The Earth and all of the other planets orbit the Sun in the same plane, what is this plane called? | Ecliptic |
| Why are all of the solar system planets found on this plane? | its where gravity keeps them |
| What is the zodiac? | If we project the ecliptic plane out into space, 13 constellations are intersected by the plane |
| Define astrology. | Is the "study" of the movement and relative positions of celestial bodies interpreted as having influence on human affairs and the natural world |
| What is the difference between astronomy and astrology? | Astronomy is about science and fact where as astrology is about the idea of Zodiac signs |
| What is the tilt of Earth’s axis (degrees)? | 23.5 degree |
| What object does Earth’s axis point to in the night time sky? | Star Polaris in the constellation Ursa Minor |
| Where does Earth rotate fastest? Slowest? | Farthest: the equator, Slowest: north and south pole |
| How many time zones are there? _____ How far apart are they separated (in degrees of longitude) around the globe? ______ What would happen to clock time if you were travelling to the east and crossed a time meridian? __________ To the west? __________ | 24; 15 degree; east becomes later time, west becomes earlier times |
| Define revolution/orbit. | the movement of a body around another body in space. The Earth in its orbit around the sun. |
| Precisely how long is an Earth year? | 365.25 days |
| Why do we need leap years? | Since there's an extra .25 of a day every 4 years we have to add an extra day to the calendar. We do this in order to keep the seasons in the same months |
| What is an Astronomical Unit? | the average distance from earth to the sun |
| What is parallax? | the effect whereby the position of an object appears to differ or shift its location when viewed from different positions |
| What is the actual shape of Earth’s orbit around the Sun? | ellipse |
| Where is the Sun located in relation of Earth(or any planets) orbit? | the center of the solar system |
| What is the name and date of Earth’s closest approach to the Sun? Name and date of farthest approach to Sun? | Perihelion is closest, on Jan 2.. Aphelion is farthest, on July 2 |
| Why does Earth experience seasons? | because the axis is tilted |
| What occurs on the Summer Solstice? What day does this occur? | sun moves to its highest point north of the equator, date is June 21 |
| What is an equinox? | two days during the year, when the sun is midway between solstices, neither hemisphere is tilted toward sun |
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