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Ch. 14 terms

Chapter 14 terms for Studying astronomy

QuestionAnswer
Kepler's First Law A law stating that the orbit of each planet is an ellipse with the sun at one focus of the ellipse
Kepler's Second Law A line joining a planet and the sun sweeps out equal areas during equal interval of times
Kepler's Third Law The Square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of its orbit
Moon A natural satellite that revolves around a planet
Astronomical unit A unit of measurement equal to Earth's average distance from the sun, about 150 million kilometers
Nuclear Fusion The process by which hydrogen atoms join together in the sun;s core to form helium
Radiation Zone a region of very tightly packed gas in the sun;s interior where energy is transferred mainly in the form of light
Convection Zone The outermost layer of the sun's interior
Photosphere The inner layer of the sun's atmosphere that gives off its visible light
Chromospheres The middle layer of the sons atmosphere
Corona The outer layer of the sun's atmosphere
Solar Wind A stream of electrically charged particles that emanate from the sun's corona
Sunspot dark area of gas on the sun's surface that is cooler then the surrounding gases
Prominence A huge, Reddish loop of gas that protrudes from the sun's surface, linking parts of the sunspot regions
Solar Flare An eruption of gas from the sun's surface that occurs when the loops sunspot regions suddenly connect
Terrestrial planet The name often given to the four inner planets: Mercury, Venus, Earth, and Mars
Greenhouse effect The trapping of heat by the planet's atmosphere
Gas Giant The name often given to the first four outer planets: Jupiter, Saturn, Uranus, and Neptune
Ring A thin disk of small ice and rock particles surrounding a planet.
Comet A loose collection of ice, dust, and small rocky particles, typically with a long narrow orbit
Coma The fuzzy outer layer of a comet.
Nucleus The central core of the atom; The solid inner core of a comet
Kuiper belt A doughnut shaped region that stretches from beyond Neptune's orbit to about 100 times Earth's distance from the sun
Oort cloud A spherical region of comets that surrounds the solar system
Asteroid The region of the solar system, between the orbits of Mars and Jupiter, where many asteroids are found
Asteroid Belt The region of the solar system, between the orbits of Mars and Jupiter, where many asteroids are found
Meteoroid a chuck of rock or dust in space
Meteor A streak of light in the sky produced by the burning of a meteoroid that passes through the atmosphere and hits Earth's Surface
Meteorites A meteoroid that passes through the atmosphere and hits Earths Surface
"Goldilocks" Condition A suitable temperature range and atmosphere for living things to survive on
Created by: rosedith