Earth’s place in our Solar System
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1 Mr. Fetch’s Earth Science Classroom Earth’s place in our Solar System 1. 1. 1. 1. Astronomy Astronomy Astronomy Astronomy is the study of is the study of is the study of is the study of space space space space and everything in it. and everything in it. and everything in it. and everything in it. People began studying space a long People began studying space a long People began studying space a long People began studying space a long time ago. time ago. time ago. time ago. Ancient Egyptian farmers Ancient Egyptian farmers Ancient Egyptian farmers Ancient Egyptian farmers • Plant crops during Nile flood Plant crops during Nile flood Plant crops during Nile flood Plant crops during Nile flood • Noticed a star during the flood. Noticed a star during the flood. Noticed a star during the flood. Noticed a star during the flood. • Predict flood by star appearance. Predict flood by star appearance. Predict flood by star appearance. Predict flood by star appearance. “Everything Everything Everything Everything” includes: includes: includes: includes: solar system solar system solar system solar system planets planets planets planets stars stars stars stars the moon the moon the moon the moon asteroids asteroids asteroids asteroids Mr. Fetch’s Earth Science Classroom Properties of Planet Earth: SHAPE What shape is earth? What shape is earth? What shape is earth? What shape is earth? Earth is a Earth is a Earth is a Earth is a sphere. sphere. sphere. sphere. • A sphere is an 3D object whose A sphere is an 3D object whose A sphere is an 3D object whose A sphere is an 3D object whose distance distance distance distance from its from its from its from its center center center center is the is the is the is the same same same same at all points. at all points. at all points. at all points.
Transcript of Earth’s place in our Solar System
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Mr. Fetch’s Earth Science Classroom
Earth’s place in our Solar System
1.1.1.1. AstronomyAstronomyAstronomyAstronomy is the study of is the study of is the study of is the study of spacespacespacespace and everything in it.and everything in it.and everything in it.and everything in it.
People began studying space a long People began studying space a long People began studying space a long People began studying space a long
time ago. time ago. time ago. time ago.
Ancient Egyptian farmersAncient Egyptian farmersAncient Egyptian farmersAncient Egyptian farmers
• Plant crops during Nile floodPlant crops during Nile floodPlant crops during Nile floodPlant crops during Nile flood
• Noticed a star during the flood.Noticed a star during the flood.Noticed a star during the flood.Noticed a star during the flood.
• Predict flood by star appearance.Predict flood by star appearance.Predict flood by star appearance.Predict flood by star appearance.
““““EverythingEverythingEverythingEverything”””” includes:includes:includes:includes: solar systemsolar systemsolar systemsolar system
planetsplanetsplanetsplanets
starsstarsstarsstars
the moonthe moonthe moonthe moon
asteroidsasteroidsasteroidsasteroids
Mr. Fetch’s Earth Science Classroom
Properties of Planet Earth: SHAPE
What shape is earth? What shape is earth? What shape is earth? What shape is earth? Earth is aEarth is aEarth is aEarth is a sphere.sphere.sphere.sphere.
• A sphere is an 3D object whose A sphere is an 3D object whose A sphere is an 3D object whose A sphere is an 3D object whose distancedistancedistancedistance from its from its from its from its center center center center
is the is the is the is the samesamesamesame at all points. at all points. at all points. at all points.
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Mr. Fetch’s Earth Science Classroom
Properties of Planet Earth: SHAPE
Aristotle observed that earth was a sphere a long time ago. Aristotle observed that earth was a sphere a long time ago. Aristotle observed that earth was a sphere a long time ago. Aristotle observed that earth was a sphere a long time ago.
• He noticed ships as they approached the horizon.He noticed ships as they approached the horizon.He noticed ships as they approached the horizon.He noticed ships as they approached the horizon.
• The top of the ship appeared first, then the rest.The top of the ship appeared first, then the rest.The top of the ship appeared first, then the rest.The top of the ship appeared first, then the rest.
•This is because the This is because the This is because the This is because the ship is ship is ship is ship is
coming up over the curved coming up over the curved coming up over the curved coming up over the curved
surface of earthsurface of earthsurface of earthsurface of earth....
Mr. Fetch’s Earth Science Classroom
Properties of Planet Earth: ROTATION
You can take earth and split it down itYou can take earth and split it down itYou can take earth and split it down itYou can take earth and split it down it’’’’s center.s center.s center.s center.• An An An An axisaxisaxisaxis is an imaginary line earth is an imaginary line earth is an imaginary line earth is an imaginary line earth spinsspinsspinsspins around. around. around. around.
• The axis is The axis is The axis is The axis is tiltedtiltedtiltedtilted about about about about 23.523.523.523.5°°°° degrees. degrees. degrees. degrees.
The The The The spin spin spin spin of earth on its axis is called of earth on its axis is called of earth on its axis is called of earth on its axis is called rotationrotationrotationrotation....
• Earth rotates Earth rotates Earth rotates Earth rotates countercountercountercounter----clockwiseclockwiseclockwiseclockwise. From West. From West. From West. From West���� EastEastEastEast• One rotation takes One rotation takes One rotation takes One rotation takes 24 hours24 hours24 hours24 hours, or , or , or , or 1 day1 day1 day1 day....
North star
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Mr. Fetch’s Earth Science Classroom
Properties of Planet Earth: ROTATION
Earth rotates at 1000mph at the equator. Earth rotates at 1000mph at the equator. Earth rotates at 1000mph at the equator. Earth rotates at 1000mph at the equator. • Jets do not even go that fast!Jets do not even go that fast!Jets do not even go that fast!Jets do not even go that fast!
• For that reason, earth is For that reason, earth is For that reason, earth is For that reason, earth is not a PERFECT spherenot a PERFECT spherenot a PERFECT spherenot a PERFECT sphere. . . .
THINK OF MAKING PIZZA, again!THINK OF MAKING PIZZA, again!THINK OF MAKING PIZZA, again!THINK OF MAKING PIZZA, again!• Toss a pizzaToss a pizzaToss a pizzaToss a pizza• What happens to its shape?What happens to its shape?What happens to its shape?What happens to its shape?
North star
Mr. Fetch’s Earth Science Classroom
Properties of Planet Earth: ROTATION
EarthEarthEarthEarth’’’’s s s s rotationrotationrotationrotation causes causes causes causes day and nightday and nightday and nightday and night....• One rotation in 24 hours (1 day).One rotation in 24 hours (1 day).One rotation in 24 hours (1 day).One rotation in 24 hours (1 day).
SUN
that-
away
North Pole
daynight
Sun’s rays
• We see the We see the We see the We see the sun move sun move sun move sun move EEEE����WWWWacross the across the across the across the sky during sky during sky during sky during the day. the day. the day. the day.
• But, its But, its But, its But, its earth that is earth that is earth that is earth that is movingmovingmovingmoving, not , not , not , not the sun. the sun. the sun. the sun. The sun just The sun just The sun just The sun just APPEARS to APPEARS to APPEARS to APPEARS to move move move move across the across the across the across the sky.sky.sky.sky.
Flashlight
And globe demo…
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Mr. Fetch’s Earth Science Classroom
Properties of Planet Earth: ROTATION
• When we are on the side of earth facing the sun, When we are on the side of earth facing the sun, When we are on the side of earth facing the sun, When we are on the side of earth facing the sun, we have daywe have daywe have daywe have day....• When we are on the side of earth opposite the sun,When we are on the side of earth opposite the sun,When we are on the side of earth opposite the sun,When we are on the side of earth opposite the sun, we have nightwe have nightwe have nightwe have night....
SUN
that-
away
North Pole
daynight
Sun’s rays
Mr. Fetch’s Earth Science Classroom
Properties of Planet Earth: ROTATION
• When we are on the side of earth facing the sun, When we are on the side of earth facing the sun, When we are on the side of earth facing the sun, When we are on the side of earth facing the sun, we have daywe have daywe have daywe have day....• When we are on the side of earth opposite the sun,When we are on the side of earth opposite the sun,When we are on the side of earth opposite the sun,When we are on the side of earth opposite the sun, we have nightwe have nightwe have nightwe have night....
SUN
that-
away
North Pole
daynight
Sun’s rays
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Mr. Fetch’s Earth Science Classroom
Properties of Planet Earth: REVOLUTION
While earth spins, it also moves around the sun. While earth spins, it also moves around the sun. While earth spins, it also moves around the sun. While earth spins, it also moves around the sun. • EarthEarthEarthEarth’’’’s motion around the sun is called s motion around the sun is called s motion around the sun is called s motion around the sun is called revolutionrevolutionrevolutionrevolution....
• Earth revolves Earth revolves Earth revolves Earth revolves countercountercountercounter----clockwiseclockwiseclockwiseclockwise around the sun.around the sun.around the sun.around the sun.
• One revolution takes One revolution takes One revolution takes One revolution takes 365.25 days365.25 days365.25 days365.25 days or or or or 1 year1 year1 year1 year....
67,0000 m
iles per ho
ur !!!
Mr. Fetch’s Earth Science Classroom
Properties of Planet Earth: REVOLUTION
The path earth takes around the sun is called an The path earth takes around the sun is called an The path earth takes around the sun is called an The path earth takes around the sun is called an orbitorbitorbitorbit. . . . • EarthEarthEarthEarth’’’’s orbit is in the shape of an s orbit is in the shape of an s orbit is in the shape of an s orbit is in the shape of an ellipseellipseellipseellipse (flat oval).(flat oval).(flat oval).(flat oval).
• The The The The sunsunsunsun is is is is offsetoffsetoffsetoffset to one side. to one side. to one side. to one side.
Earth’s ORBIT
PerihelionPerihelionPerihelionPerihelion: JANUARY 3: JANUARY 3: JANUARY 3: JANUARY 3rdrdrdrd
Closest to the sunClosest to the sunClosest to the sunClosest to the sun
AphelionAphelionAphelionAphelion: JULY 4: JULY 4: JULY 4: JULY 4thththth
Furthest from the sunFurthest from the sunFurthest from the sunFurthest from the sun
X X
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Mr. Fetch’s Earth Science Classroom
Review
1.1.1.1. What shape is earth? What shape is earth? What shape is earth? What shape is earth?
2.2.2.2. What is itWhat is itWhat is itWhat is it’’’’s axis?s axis?s axis?s axis?
3.3.3.3. What causes day and night?What causes day and night?What causes day and night?What causes day and night?
4.4.4.4. What is rotation and revolution?What is rotation and revolution?What is rotation and revolution?What is rotation and revolution?
5.5.5.5. What shape is earthWhat shape is earthWhat shape is earthWhat shape is earth’’’’s orbital revolution around the sun?s orbital revolution around the sun?s orbital revolution around the sun?s orbital revolution around the sun?
6.6.6.6. What is the Aphelion and Perihelion?What is the Aphelion and Perihelion?What is the Aphelion and Perihelion?What is the Aphelion and Perihelion?
