Presentation on theme: "Warm-UP NoteBook – ORGANIZE Earth, Moon and Sun Study Guide Vocabulary"— Presentation transcript:
1Warm-UPNoteBook – ORGANIZEEarth, Moon and Sun Study GuideVocabularyWarm-UP/Notes2/12/2015 WARM-UP – True or FalseThe sky seems to turn because Earth stays still.Mass is the force that keeps a satellite in orbit around an object in spaceEarth is a satellite of the sun.
22.1 Earth rotates on a tilted axis and orbits the sun. Earth’s rotation causes day and nightEarth’s gravity pulls objects toward the center of the EarthAs the Earth turns so do you BUT you keep the same position with what is below your feet; the view above your head changes.North, South, East and West are based on the Earth’s rotationAxis of Rotation – an imaginary line running through the center of the Earth; its ends are the north and south poles. Any location on the Earth moves from WEST to EAST as the Earth turns.
3At any one time ½ of the Earth is in darkness and ½ is in sunlight It takes 24 hours for the Earth to make a complete rotation on its axis.Sunlight = daytimemiddle of sunlight side=noonDarkness = nightmiddle of dark side = midnight
4Earth’s tilted axis and orbit cause seasons Sun’s gravity causes the Earth to be pulled toward the sun’s centerEarth moves sideways, at nearly a right angle to the sun’s direction.This causes a round orbitRevolution – motion of one object around another. (revolve)The Earth revolves around the sun – 365 days /1 yearVideo: The movement of the Earth
5Earth is tilted on it’s axis at a 23.5 degree angle Earth’s axis is always tilted the same direction in space.Earth’s orbit is not a perfect circleEarth is closer to the sun in January than it is in JulySeasonal PatternsSeasons –patterns of temperature changes and other weather trends over the course of a year.Amount of sunlight = temperature change tilt of Earth’s axisAs the Earth travels around the Sun, the area of sunlight in each hemisphere changes.
6Equinox – sunlight shines equally on the northern and southern hemispheres; ½ of each hemisphere is in sunlight and ½ is in darkness – sunlight centered on the equatorSeptember Equinox - beginning of Fall in the northern hemisphere beginning of Spring - southern hemisphereMarch Equinox beginning of Spring – northern hemisphere beginning of Fall - northern hemisphere
7Solstice – the area of sunlight is at its greatest in one hemisphere and is at a minimum in the other hemisphereDecember SolsticeNorthern HemisphereNorth pole seems to tilt away from the sunNorth pole in complete darknessWinter solstice2. Southern HemisphereSouth pole seems to tilt toward the sunSouth pole is in complete sunlightSummer solstice
8Opposite of December solstice June SolsticeOpposite of December solsticeNorth pole seems to tilt toward the sunBeginning of summer in the Northern HemisphereSouth pole seems to tilt away from the sunBeginning of winter in the Southern Hemisphere
9Angle of light affects temperature Angles of SunlightAngle of light affects temperatureSun high in the skySun low in the skySunlight strikes close to aright angleSunlight strikes at aslantEnergy of sun is concentratedEnergy of sun is spread outShadows are shortShadows are longsunburnwarms less
10Lengths of DaysThe farther you get from the Equator, the more extreme the changes in day length becomeClose to the poles – Sun does NOT set for 6 months at a timeNear the equator – daylight and darkness are almost equal year-round; about 12 hours eachVideo: Seasons