# Earth and the Sun Earth Science 2013. Definition: The study of the ______, ______ and other objects in _____________.

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Earth and the Sun Earth Science 2013

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

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 The ___________ we live on Only Planet with __________ (that we know of…) _________ ________ from the Sun

Earth The Earth is an _________ planet  _________________________

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 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 ______________ 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 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 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 = _____________

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 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 Seasons Spring Equinox  Starts around _____________  The Suns is directly over the _________ creating an equal amount of daytime and nighttime  Marks the beginning of ______________

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 _____________ Four Seasons

Autumnal Equinox – Starts around _____________________ – The Suns is directly over the ____________ creating an equal amount of ___________ and ______________ – Marks the beginning of ______________ Four Seasons

Climate Zones

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.

Lunar Landing Sites

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