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Description
Flashcards by Jenny Johnson, updated more than 1 year ago
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Created by Jenny Johnson
about 4 years ago
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| Question | Answer |
| The paths that planets follow around the sun are called | orbits |
| The shapes that the paths that planets follow around the sun are | elliptical |
| The spinning motion of a planet on its axis | rotation |
| The length of time a planet takes to make one complete turn on its axis represents what on that planet? | a day |
| The Greek scientist who first theorized that the sun and planets revolved around the earth | Aristotle |
| Planets of our solar system orbit the ____________ | sun |
| Telescopes that use lenses for focusing light | refracting |
| A spectroscope is designed to separate __________ into component colors | light |
| Italian scientist that first used a telescope to study astronomy | Galileo |
| Distance light travels in a year is called ___________ | light year |
| One complete rotation of a planet is equal to one _________ on that planet | day |
| Elements in the stars can be identified with | spectroscope |
| The astronomical unit, the light year, is a measure of ___________ | distance |
| Invention of the telescope was important to the study of astronomy because.... | it helped man discover the nature of the heavenly bodies and their nature |
| How does the diameter of the lenses of a telescope affect our ability to see stars? | The larger the lens, the greater the magnification |
| Why do we use special units to measure distances in space? | Because distsances are so great it would be nearly impossible to work with such large numbers |
| Contrast the methods of scientists in the days of Aristotle with those in the days of Newton | Aristotle did not experiment and was interested in the why Newton found experiments necessary to define the what and how |
| What are contributions of Galileo? | 1. First to use telescope 2. "Father of modern science" 3. Found evidence for heliocentric theory |
| What are contributions of Copernicus? | First in modern times to promote the heliocentric theory |
| What are contributions of Kepler? | Wrote the laws of planetary motion |
| What are the contributions of Newton? | Published the law of universal gravitation |
| What are the contributions Aristarchus? | First to suggest that Earth orbited sun |
| 3 motions in the sky that you can observe using only your senses | 1. motion of sun and moon across sky 2. motion against background of fixed stars 3. seasonal motion north and south from horizon |
| What are the major differences between the geocentric and heliocentric theories? | Geocentric: earth at center, heavenly bodies, orbit earth Heliocentric: sun at center, bodies orbit the sun |
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