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Earth and the Sun. Earth Science 2013. Astronomy. Definition: The study of the ______, ______ and other objects in _____________. The Sun. The Sun is the center of our ______________ There are ____ planets in our solar system We are __________________from the Sun

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earth and the sun

Earth and the Sun

Earth Science 2013

slide2

Astronomy

  • Definition: The study of the ______, ______ and other objects in _____________
slide3

The Sun

  • The Sun is the center of our ______________
  • There are ____ planets in our solar system
  • We are __________________from the Sun
  • The Sun is responsible for all the _______ we receive on Earth
earth
Earth
  • The ___________ we live on
    • Only Planet with __________ (that we know of…)
  • _________ ________ from the Sun
earth1
Earth
  • The Earth is an _________ planet
    • _________________________
    • _________________________
    • _________________________
earth s movements
Earth’s Movements
  • ____________: One spin on its axis
  • Takes about ___________to rotate once
  • This rotation causes _______ and ________
  • Sun always rises in the _____ and sets in the ________
earth s movements1
Earth’s Movements
  • _____________ (orbit): One lap around the Sun
  • This takes about _________or one year to complete
  • The path is not quite a circle; its more of an _______________
calendars
Calendars
  • ______________ mark time on earth in 24 hour days and 365 days per year
  • The __________ astronomers counted the days between the appearance of the star Sirius and found an average of 365 days between appearances.
  • So the Egyptians came up with one of the first Calendars!
leap years
Leap Years
  • The path of the Earth around the Sun actually takes ____________to complete.
  • Every fourth year we add up the extra time

¼ + ¼ + ¼ + ¼ = _________________

  • This day is added to the calendar every 4 years on __________________
  • Leap Years: 2004, 2008, 2012, 2016, 2020, 2024, 2028, etc
earth s tilt
Earth’s Tilt
  • Earth has seasons because ______ _______

as it moves around the Sun

  • WE ARE IN THE __________ ____________
  • When the Northern Hemisphere is tilted towards the Sun, we get the most sunlight = _____________
  • When the Northern hemisphere is tilted away from the Sun, we get the least sunlight = _____________
seasons1
Seasons
  • Most places on Earth have 4 distinct seasons: _____________________________________
  • The length of each season depends on its location on the Earth and how the _________ hits the Earth
  • The __________________of the Earth creates three different climates: tropical, temperate, and polar
four seasons
Four Seasons
  • Winter Solstice
    • Starts around _________________
    • Northern Hemisphere is tilted _________ from the Sun
    • The rays from the Sun are the ___________
    • _______________ day of the year in Northern Hemisphere; longest day of the year in the Southern Hemisphere
    • Marks the beginning of ___________
four seasons1
Four Seasons
  • Spring Equinox
    • Starts around _____________
    • The Suns is directly over the _________ creating an equal amount of daytime and nighttime
    • Marks the beginning of ______________
slide16

Four Seasons

  • Summer Solstice
    • Starts around _______________
    • Northern Hemisphere is tilted __________ the Sun
    • The rays from the Sun are the ____________
    • ____________ day of the year in Northern Hemisphere; shortest day of the year in the Southern Hemisphere
    • Marks the beginning of the _____________
slide17

Four Seasons

  • Autumnal Equinox
    • Starts around _____________________
    • The Suns is directly over the ____________ creating an equal amount of ___________ and ______________
    • Marks the beginning of ______________
the moon
The Moon
  • The Moon takes ___________ to revolve around the Earth
  • The Moon takes 27.3 days to ___________on its axis
  • Therefore, we only ever see __________of the moon.