The Sun and Solar System Study Guide

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it takes ____ mins. for light from the sun to reach Earth

8

the temperature in the core of sun is hotter or cooler than at the surface

hotter

the part of sun that gives its yellow color is

photosphere

difference between solar flares and soloar prominence

solar flares: comback, solar prominence: loop

define solar wind and what does it cause

electric charged particles out into space; auroras

the sun is made of two main gases

hydrogen and helium; produces energy by nuclear fusion

name the planets in order

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune

the orbits of planets are shapes as an

ecllipse

retrograde orbits move

westward; clockwise

two planets that have retrograde orbits are

Venus and Uranus

prograde orbits move

eastward; counterclockwise

Earth-centered model of solar system

geocentris

Sun-center model of solar system is

heliocentric

terrestrial planets:

Mercury, Venus, Earth, and Mars

2 characteristics of terrestrial planets

rockycrust and made of Si, O2, Fe, no rings

terrestrial planets have a density _____ than 1

greater

the 4 gas giants

Jupiter, Saturn, Uranus, and Neptune

2 characteristics of gas giants

huge gaseous w/ rockycore and H & He, rings, satellites

jovian (gas giants) planets have a density ____ than 1

less

evening star and morning star planet

Venus

great red spot planet

Jupiter

valles marineris planet

Mars

90 degree tilt of its axis planet

Uranus

Earth's satellite

Moon

Jupiter's main satellites

Galilean, Io, Europa, Ganymear, and Callisto

Neptune's main satellites

Triton and Nereid

Pluto's main satellite

Charon

asteroid belt between planets

Mars & Jupiter

small rocky fragments traveling in space

meteoroids; meteor traveling through atmosphere; meteorite when it hits Earth

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