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The Solar System

The Solar System and the Universe Study Guide

TermDefinition
How many planets in the solar system? 8 planets in the solar system
What does revolve mean? orbit, travel
How many planets revolve around the sun All planets
What causes a year? Revolutions around the sun
What do all planets rotate on? their axis
What does the rotation on the axis cause? Day and night
How many inner planets are there? 4 inner planets
How many outer planets are there? 4 outer planets
What are attributes of the 4 inner planets? solid rocky surface, very dense, thin atmosphere, small diameters, large solid cores, few moons, shorter revolution times
What are the 4 inner planets? Mercury, Venus, Earth, Mars
What are the attributes of Mercury? no moons, craters, smallest planet
What are the attributes of Venus? thick clouds that trap carbon dioxide and heat the planet, no moons
What are the attributes of Earth? perfect distance from Sun for life, one moon
What are the 4 outer planets? Jupiter, Saturn, Uranus, Neptune
What are the attributes of Jupiter? largest planet, Great Red Spot, 63 moons
What are the attributes of Saturn? second largest, thousands of rings, 61 moons
What are the attributes of Uranus? rotates on its side, bright clouds from surface gases, 27 moons
What are the attributes of Neptune? windiest planet, Great Dark Spot, 13 moons
Asteroids made of rock and iron, orbins the sun, found between Mars and Jupiter in the asteroid belot
Meteoroid piece of rock that breaks off an asteroid and travels through space
Meteor when a meteoroid burns up in Earths atmosphere causing a streak of light
Meteorite when a meteoroid reaches Earth's surface
Galaxies our solar system is part of the milky way galaxy, located on one of its arms
Spiral (Milky Way's shape) like a pinwheel, bulge of older stars in the center with a rotating disk of younger stars, gas and dust
Barred spiral galaxy may have 2 or more spiral arms, young stars at the center
Irregular galaxy no particular shape, lots of gas and dust to form new stars
Elliptical galaxy brightest at their center, shaped like a shere or flattened glob, made up of old stars and little gas/dust
light year 4.5,878,786,100,000 miles
star A ball of light glowing gas
What is the closest star to earth? Sun
Why does the sun appear so large? Because it is the closest star to earth
Sun medium sized yellow star
What are stars classified by? Color, temperature, brightness and size
Are stars that are the same color the same temperature? Yes
What is color is the coolest temperature for a star? red
What color is a medium temperature for a star? yellow
What color is the hottest temperature for a star? blue
What are seasons caused by? Earth's tilt on its axis
As the earth revolves the sun does its tilt remain the same? yes
What season is it when the Northern hemisphere is titled toward the sun? summer
What season is it when the Northern hemisphere is titled away from the sun? winter
What are the four seasons? Winter, Spring, Summer, Fall
What months make up the winter? dec, jan, feb
What months make up the spring? march, april, may
What months make up the summer? june, july, august
What months make up the fall? september, october, november
Is the moon the earth's only satellite? Yes
How often does the moon orbit the earth every 29.5 days (about a month)
What are the moons phases? New moon, first quarter, waxing gibbous, full moon, waning gibbous, third quarter moon, waning crescent,
New moon lit side of the moon is not facing earth(moon is between earth and sun)
Waxing crescent increasing in size, small sliver of the moon
first quarter 1/2 moon is visible
waxing gibbous decreasing in
waning gibbous decreasing in size, headed to a 3rd quarter moon
third quarter moon 1/2 the moon is visible, still getting smaller
waning crescent decreasing in size, small sliver of the moon
new moon lit side of the moon is not facing earth (moon is between earth and sun)
Created by: davesam1925