Download Earth`s Motion • Earth has two major types of motion • Earth`s

Earth’s Motion
• Earth has two major types of motion
• Earth’s _________________________
• Earth’s _________________________
EARTH’S ROTATION
• The spinning of the Earth on its ____________
• the axis is the ___________________ line that runs
vertically through the _______________of the Earth
• rotates from ______________ to ________________
• Rotation of the Earth produces 2 main effects:
• ______________causes the length of a day to be about
_________________________
• Causes daily changes from day to night
• At all times _____________of the Earth faces the
sun, while the other half is in __________________
• Areas within the Artic & Antarctic circles
experience several weeks of daylight or
darkness depending on the time of _____________.
EARTH’S REVOLUTION
• The movement of Earth around the sun
• Earth’s ______________ is the slightly elliptical path that
it travels around the sun
• The sun is not in the center:
• Around _____________________earth is about
147million km away (closer)
• Around _________________earth is about 152
million km away (farther)
• Revolution has 2 major effects:
• The time it takes Earth to revolve around the sun
_________________defines the length of a ____________
• It takes _____________days to make
________complete revolution
• Every 4th year is __________year to make up
for the extra day we gained
• Earth revolves with a tilt of the axis
• The revolution causes the _____________________seasons
CHANGING SEASONS
If we are closer in January than in July, why is it that we have
OUR coldest days of the year during this time?
• Earth’s tilted axis combined with the revolution
causes seasons to change
•
• Earth’s axis is at an angle of 23.5° to its ________________
• The axis always points in the ______________direction as the
Earth orbits the Sun
• The Northern hemisphere points__________________the
sun half of the year & ________________ from the sun for
half the year
• The tilt causes the Earth’s surface to receive
___________________amounts of _______________energy
throughout the year
Solstices
• A _______________ is the day when the Sun reaches its
greatest distance north or south of the _________________.
• The day Earth is tilted __________ toward the sun
• ___________________ is the ______________ solstice
(northern hemisphere)
• The most direct rays hit the Tropic of
_____________ in the northern hemisphere
causing the northern hemisphere to have
___________ temperatures and ______________
sunlight hours
• ______________ day of sunlight for the year
• Daylight gets a little ______________ each day
____________ the solstice
EQUINOX
• An _____________________ is the day the Sun’s rays are directly
above the Earth’s equator.
• During this time _______________ amounts of sunlight
are received all over the earth with the most direct
rays hitting at 90° at the ________________
• _____________________is the _______________ equinox
(northern hemisphere)
• ________________________ is the _________________ equinox
(northern hemisphere)
• Seasons are _____________________ in the Southern
Hemisphere.
SEASONS AT A GLANCE (Fill in the chart)
• The height of the sun above the horizon varies with the
season.
RADIATION FROM THE SUN
• The hemisphere that is tilted toward the sun receives
_____________ daylight hours and _______________more
radiation from the sun
• The sun’s radiation strikes the earth surface at a
_________________angle when the hemisphere is tilted
toward the sun
• The higher the angle the _________radiation the earth
absorbs, creating ____________temperatures.
CLIMATIC ZONES
• The amount of sunlight affects Climatic Zones
• The __________________, distance north or south from the
equator, affects the _____________________that commonly
occur in that area.
• The _____________________from the equator the less
direct the suns rays are
• Theses yearly patterns cause weather patterns to
occur in different regions of the earth that create
______________________ .
Things I might want to know for the test: (Please use these
questions as part of your study guide, in other words….DO NOT
LOSE this )
1. Which day has the MOST sunlight in the United States?
______________________________. What is this day called?
______________________.
2. How long would it take the Earth to complete 4 orbits
around the Sun? ____________________________.
3. What month would have the hottest surface temps in the
Southern Hemisphere? ______________________.
4. If the Earth rotates 360 degrees in 24 hours, how many
degrees would rotate on its axis in 2 hours? _____________.
5. What would happen if the Earth’s rate of rotation were to
decrease? ________________________________________________________.
6. In the Northern Hemisphere, during which month does the
solstice with the shortest day and longest night occur?
________________________________.
7. Why is it necessary to add a day to the calendar every four
years?______________________________________________________________.
8. What causes the apparent rising and setting of the sun as
seen from Earth? ________________________________________________.