Chapter 14 terms for Studying astronomy
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| 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
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| Kepler's Second Law | A line joining a planet and the sun sweeps out equal areas during equal interval of times
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| 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
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| Moon | A natural satellite that revolves around a planet
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| Astronomical unit | A unit of measurement equal to Earth's average distance from the sun, about 150 million kilometers
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| Nuclear Fusion | The process by which hydrogen atoms join together in the sun;s core to form helium
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| Radiation Zone | a region of very tightly packed gas in the sun;s interior where energy is transferred mainly in the form of light
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| Convection Zone | The outermost layer of the sun's interior
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| Photosphere | The inner layer of the sun's atmosphere that gives off its visible light
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| Chromospheres | The middle layer of the sons atmosphere
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| Corona | The outer layer of the sun's atmosphere
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| Solar Wind | A stream of electrically charged particles that emanate from the sun's corona
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| Sunspot | dark area of gas on the sun's surface that is cooler then the surrounding gases
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| Prominence | A huge, Reddish loop of gas that protrudes from the sun's surface, linking parts of the sunspot regions
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| Solar Flare | An eruption of gas from the sun's surface that occurs when the loops sunspot regions suddenly connect
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| Terrestrial planet | The name often given to the four inner planets: Mercury, Venus, Earth, and Mars
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| Greenhouse effect | The trapping of heat by the planet's atmosphere
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| Gas Giant | The name often given to the first four outer planets: Jupiter, Saturn, Uranus, and Neptune
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| Ring | A thin disk of small ice and rock particles surrounding a planet.
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| Comet | A loose collection of ice, dust, and small rocky particles, typically with a long narrow orbit
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| Coma | The fuzzy outer layer of a comet.
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| Nucleus | The central core of the atom; The solid inner core of a comet
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| Kuiper belt | A doughnut shaped region that stretches from beyond Neptune's orbit to about 100 times Earth's distance from the sun
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| Oort cloud | A spherical region of comets that surrounds the solar system
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| Asteroid | The region of the solar system, between the orbits of Mars and Jupiter, where many asteroids are found
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| Asteroid Belt | The region of the solar system, between the orbits of Mars and Jupiter, where many asteroids are found
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| Meteoroid | a chuck of rock or dust in space
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| 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
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| Meteorites | A meteoroid that passes through the atmosphere and hits Earths Surface
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| "Goldilocks" Condition | A suitable temperature range and atmosphere for living things to survive on
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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