Sarah Baehren, Becca Mitchell, Macey Fruth, Liz Navarre The Sun and Earth Sarah Baehren, Becca Mitchell, Macey Fruth, Liz Navarre

The Sun The Sun is a star and is the largest object in our solar system 109 Earth’s can stretch across the Sun’s surface About 70% Hydrogen and 28% Helium and 2% combination of other gases Deep in the Sun the temperature is 27 million degrees

Sun Continued… Corona- Is the outermost layer and can only be seen during solar eclipses Photosphere- Surface of the sun and only part we can actually see Convective Zone- Outermost ring of the sun Radiative Zone- The layer above the core Core- Center of the sun also the hottest part Sunspots- Found on the photosphere Solar Flare- a sunspot group that creates big explosions from the sun

The Earth The Earth is a planet and is the 5th largest planet 3rd planet from the sun in our solar system 78% nitrogen 21% oxygen 0.9% argon and 0.03% carbon and other gases Record low: -127 degrees F Record high: 136 degrees F

Earth Continued… Crust- Earth’s hard outer shell and is much thinner than the other layers Mantle- Is most of the Earth and takes over 2/3 of the Earth’s mass Outer Core- Made of liquid magma Inner Core-Completely solid

Earth and Sun The usual distance between the Sun and the Earth is 93 million miles Both are hotter at their core than their surface They are both nearly spherical and rotate on their axis Sun is much hotter and bigger than the Earth

Rotation Rotation is the Earth as it spins on its axis and it makes the 24 hour day and night on Earth It causes different times in countries and continents Parts of the Earth that are facing the sun are having day and parts that are facing away have night Earth on its axis goes from east to west

Revolution Revolution is the movement of Earth around the Sun in one year and it makes our seasons The hemisphere that is closer to the sun will have summer and the farther is winter

Solstices Winter Solstice occurs on December 21 and marks the beginning of winter and is the shortest day of the year Summer Solstice occurs on June 21 and marks the beginning of summer and is the longest day of the year

Equinoxes Equinox means that night and day are the same length Vernal Equinox starts in late March and is the beginning of spring Autumunal Equinox starts in late September and is the beginning of fall

Heliocentric vs. Geocentric Geocentric- A model when the Earth is in the center of the solar system Heliocentric- A model when the Sun is in the center of the solar system Heliocentric is the present day model for the world