Baseball Review Astronomy

Grade 8

Astronomy

Famous Discoveries

•discovered elliptical orbits- Kepler•sun-centered solar system heliocentric model•Earth-centered solar system geocentric model

Famous Discoveries

•supported heliocentric view of solar system-

Copernicus•supported geocentric view of universe-

Ptolemy

Stars

•gas and dust nebula •forms from nebula protostar

Stars

•stars are classified by:•temperature, brightness, and size

•produces energy in sun and other stars

•nuclear fusion

Terms

•galaxy shaped like a pinwheel•spiral galaxy•galaxy shaped like a flattened oval

•elliptical galaxy

Terms

•explains origin of universe•Big Bang Theory •uses mirrors to gather light •reflecting telescope

Terms

•element that makes up 60% of a star

•hydrogen• length of Earth’s rotation•24 hours

Terms

•uses lenses to gather visible light•refracting telescope•Earth’s path as it revolves around the Sun

•orbit

The Lives of Stars

•follows red giant stage of medium sized star

•white dwarf• follows white dwarf stage •black dwarf

The Lives of Stars

•compares temperature and brightness of stars

•Hertzsprung-Russell diagram•follows supernova of supergiant star

•black hole

The SunThe Sun

• outermost layer of sun• corona• loops of gases that link sunspot

regions• prominences• explosions that occur when sunspots

connect• solar flares

Terms

•causes day and night •Earth’s rotation• imaginary line that passes thru. Earth’s center

•axis

Terms

•movement of one object around another

•revolution•study of moon, stars and other objects in space

•astronomy

It’s time for the 7th inning stretch !

Take me out to the ball game,Take me out with the crowdBuy me some peanuts and Cracker Jack,I don't care if I never get back.Let me root, root, root for the home team,If they don't win, it's a shame.For it's one, two, three strikes, you're out,At the old ball game.

The Sun

• layer of the sun visible during a total solar eclipse

• corona• stream of electrically charged particles sent

out from the corona• solar wind• dark areas on the sun that are cooler than

the layers around them• sunspots

Terms

• large satellite in which people can live for long periods of time

•space station•main way US launches equipment into space

•space shuttles

Terms

•rise and fall of water•tides•type of rocket used to send objects into space

•multistage rocket

The Moon

• round pits formed by meteorites-• craters• dark, flat areas on moon’s surface• maria• depends on how much of sunlit side

of moon faces Earth• phases

PlanetsPlanets

• made up almost entirely of gases

• gas giants• axis tilted at 90o angle• Uranus

PlanetsPlanets

• similar to our moon• Mercury• Earth’s twin• Venus

TermsTerms

• life other than that on Earth• extraterrestrial life• pattern of stars in sky• constellation• energy that can travel thru space

in form of waves• electromagnetic spectrum

PlanetsPlanets

• famous for its rings • Saturn• most massive planet• Jupiter• only planet with known life

• Earth• retrograde rotation

• Venus