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56 Cards in this Set
- Front
- Back
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The Universe began to expand with an explosion of concentrated matter and energy...still expanding today
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Big Bang Theory
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1. a super nova-star exploded
2. a nebula was created (ball of dust, gas and elements) 3. the nebula started spining (fussion reactions) 4. planets move counter clockwise in an elliptical path (oval shape) 5. sun's gravity and law of inertia combine to start make the planets orbit the sun |
Nebular Theory
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24 hours.....1 day
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Rotation of Earth on its axis
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365 days....1 year
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Revolution of the earth around the sun
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How much is the earth tilted on its axis?
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23.5 degress...the tilt causes seasons
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When the hemisphere leans towards the sun its what time of year?
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summer
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When the hemisphere leans away from the sun its what time of year?
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winter
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the northern hemisphere is at it greatest "lean" towards the sun (longest day of the year)
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Summer Solstice (June 20-21)
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the northern hemisphere is at it greatest "lean" away from the sun (shortest day of the year)
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Winter Solstice (Dec 20-21)
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legth of day is equal to length of night
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equinax
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What is Sept. 22?
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Autumnal Equinox
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What is March 21?
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Vernal Equinox
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What are 2 features of the moon?
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It is 1/4 of the earths diameter and it rotates every 27 days and revolves around earth every 27 days
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What are the phases of the moon? LOOK ON PAPER AND NAME PHASES
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~New Moon
~Waxing Crescent ~Half moon-1st quarter ~Waxing gibbous ~Full Moon ~Waning Gibbous ~Half moon- last quater ~Waning Crescent ~New moon |
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rise and fall of oceans due to moon's gravitational pull
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Tides
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a shadow formed by an object that is in the path of sunlight
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Eclipes
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moon comes between the sun and earth (not happen offen)
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Solar Eclipes ( S M E )
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earth between sun and moon
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Lunar Eclipse ( S E M )
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What are the classifications of a star?
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-Supergiant
-Giant -Sub-Giant -White Dwarfs -Neutron stars |
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What are stars made up of?
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94% Hydrogen and 6% Helium
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What are the 3 layers of the sun's atmosphere?
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1. Photosphere (inner)
2. Chromosphere (middle) 3. Corona (outer) |
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What activity is going on in the sun?
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-Prominence
-Soler flares -solar wind -sunspots |
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How many planets are there?
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9...DUH
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What is the path called that when the planets circle the sun?
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orbit
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What are moons made of?
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ice and dust
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Whats it called when the earth goes around the sun?
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revolution aka year
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What is the name we use to describe the orbital motion of te planets around the sun?
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elliptica
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What is the point in orbit where the planet is nearest to the sun?
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perihelio
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When planets spin from west to east what is it called?
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retrograde
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How long does it take Jupiter to spin on axis?
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9 hours 55 min
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What planet has the longest day?
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Venus...spinning slowley
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What planet has heavily cratered surface that were maybe made by metiorites hitting the surface
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Mercury
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Why dont there crates get smoothed out?
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B.C theres no wind or rain
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What kind of cloud are in Venus's atmosphere and what do they do?
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They are clouds made up of carbon dioxide and they are so thick that they trap the sun's heat and creat a "greenhouse effect"
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What's earths natual satellite?
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the moon
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What is mars named after and why?
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the Roman god of war b.c of it blood red color?
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What is mars nick name?
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The red planet
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Where is the Asteriod belt located?
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between near and distance planets (mars and jupiter)
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What is red spot on Jupiter called and what is it?
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its called "the great red spot" and its a thousand year old hurricane and is the most preminent feature on Jupiter
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What does Saturn have the circle's it?
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rings
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Which planet is the least dence in are Solar System?
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Saturn
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What is Uranus blue-green color caused by?
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methane in its atmosphere
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Is Uranus tilted on axis?If so how much?
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yes, its tilted 90 degress so it travels around the sun on its side
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What does Neptune get its color from?
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methane like Uranus
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What might Pluto be?
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an excaped moon from Neptune
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What does Plutos surface seem to be?
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Icy-water
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What is Plutos orbit called and whats wrong with it?
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Its orbit is Eliptical and it sometimes its path is inside of Neptunes path
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What are the parts of a comet?
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-Nucleus
-Coma -Tail |
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What is the Nucleus of a comet?
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a core of dirty ice
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What is the Coma of a comet?
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gas cloud that surrounds the necleus
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What is the Tail of a comet?
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ice that turns to gas
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a rock that doesnt burns up completely in the atmosphere and hits the earths surface
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meteorite
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What are tides that ae not very high or not very low called?
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neaps
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What are shimering curtains of colored light?
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aurora
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What is the longest day of the year?
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summer solstice
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What is in the soil on Mars?
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iron-oxide aka rust
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