| A | B |
|---|
| sphere | What earths' shape is similar to due to gravity |
| gravity | the attractive force between bodies that is teh reason the earth and other planets take the shape of a sphere |
| ellipse | the shape of the orbits of the planets around our sun |
| time zones | is 15 degrees of arc around the earths' equator and is equal to one hour |
| rotation | the term for earth spinning on its' own axis |
| revolution | the term for the movement of earth around the sun |
| ecliptic | the apparent path created by the earth revolving around the sun |
| equinox | When the sun is directly above earth equator, spring & fall |
| solstice | When the sun is at its' greatest distance above or below the equator |
| tide | The rise and fall of the oceans based on the moons and suns gravitational pull |
| moon phase | The changing appearance of the sun as it goes from new to full and back to new again |
| solar eclipse | When the moon moves in between the earth and sun |
| lunar eclipse | When the moon falls into the shadow cast by the sun on the earth |
| maria | The dark colored and relatively smooth areas on the moon |
| regolith | The debris on the moons' surface created by impacts from meteors |
| ASTRONOMY | The study of the moon, stars, and the objects in space. |
| AXIS | An imaginary line that passes through Earth's center and the North and South poles, about which Earth rotates. |
| ROTATION | The spinning motion of a planet about its axis. |
| REVOLUTION | The movement of an object around another object. |
| ORBIT | The path of an object as it revolves around another object in space. |
| LATITUDE | The distance north or south from the equator, measured in degrees. |
| EQUINOX | The two days of the year on which neither hemisphere is tilted toward or away from the sun. |
| PHASE | One of the different shapes of the moon as seen from Earth. |
| ECLIPSE | The partial or total blocking of one object by another. |
| SOLAR ECLIPSE | The blocking of sunlight to Earth that occurs when the moon is between the sun and Earth. |
| UMBRA | The darkest part of a shadow. |
| PENUMBRA | The part of a shadow surrounding the darkest part. |
| LUNAR ECLIPSE | The blocking of sunlight to the moon that occurs when Earth is directly between the sun and moon. |
| TIDE | The daily rise and fall of Earth's waters on shores. |
| SATELLITE | Any object that revolves around another object in space. |
| TELESCOPE | A device built to study distant objects by making them appear closer. |
| CRATER | A round pit on the moon's or other surface, created by a force of impact. |
| MARIA | Dark, flat regions on the moon's surface. |
| ASTRONOMICAL UNIT | Unit to measure large distances in our solar system |
| EXTRA SOLAR | Outside our solar system |
| GEOCENTRIC MODEL | Earth centered model |
| HELIOCENTRIC MODEL | Sun centered model |
| subtropical highs | stable belts of pressure that are at 30 degrees lat |
| coriolis effect | twist in wind pattern due to earth rotation |
| friction | slows air at surface & modifies the direction |
| weather fronts | point at which air masses interact |
| maritime | moist air mass coming from body of water |
| continental | dry air masses that originate over land |
| cumulonimbus | formed from unstable air-produce thunderstorms |
| downdraft | sinking column of cold air. |
| hurricane | tropical storm that can last for days |
| typhoon | western pacific hurricane |
| troposphere | layer nearest ground |
| stratosphere | layer with permanent temp inversion |
| tropopause | boundary between troposphere and stratosphere |
| temperature inversion | temp increases with height |
| jet stream | fast and powerful wind system |
| gravity | attractive force |
| ellipse | shape of earths' orbit |
| Venus | most like Earth |
| sphere | earths' shape |
| magnetic field | protects Earth from radiation |
| magnetosphere | deflects harmful radiation and is in the magnetic field |
| Aurora | charged particles that emit light |
| Aristotle | made early observations for earths shape |
| main sequence | stars in stellar equillibrium on HR diagram |
| giant | phase star goes into when hydrogen is depleted |
| solar mass | mass of our sun |
| photosphere | outer layer of sun which gives us light |
| sunspots | areas of lowed temperature on surface of sun |
| constellation | group of stars that have been given a name |
| refracting telescope | uses lens to magnify image |
| reflecting telescope | uses a mirrored lens to magnify image |
| radio telescope | telescope that sees invisible wavelength of energy |
| optical telescope | telescope to see images in visible light range |
| light-year | distance light travels in one year |
| spectroscope | device to break light up into component wavelengths |
| galaxy | mass of stars, planets, dust, ice and gas |
| Milky Way | galaxy that our solar system is in |
| Local Group | Cluster of galaxies that the Milky Way is in |
