Know about the Earth’s Interior

Know about the Earth’s Atmosphere

Know about the Earth’s Magnetic Field

The Earth – Inside and Out

Lesson OverviewEarth’s InteriorEarth’s AtmosphereEarth’s Magnetic Field

Earth’s Interior: Three PartsCrust is the outer layer of Earth

The next layer down is the mantle, a thick solid layer between Earth’s crust and its core

The core of the Earth is the central part of the Earth, made up of a solid inner core surrounded by a liquid outer core

Earth’s Three LayersChemical

differentiation refers to the sinking of denser material toward the center of planets or other objects

Motion of the Earth’s Crust Continental drift - the

gradual motion of the continents relative to one another

Rift zone - a line near the center of the Atlantic Ocean from which lava flows upward

Plate tectonics - the motion of sections (plates) of the Earth’s crust across the underlying mantle

Earth’s Atmosphere Earth’s atmosphere is

made up of 78% nitrogen, 21% oxygen and 1% trace gases

4 layersTroposphereStratosphereMesosphereThermoshpere

Transition to Space

Temperature Shift

Ozone Layer

Where we live

Solstices and Equinoxes Solstice—either of the twice-yearly times when the Sun

is at its greatest distance from the celestial equatorAltitude – height measured as an angle above the

horizon Vernal and autumnal equinoxes are the points when the

Sun crosses the celestial equator At the equinoxes, night and day are equal

Earth’s Magnetic Field A magnetic field - what

exists in a region of space where magnetic forces can be detected

Magnetic north and the geographic North Pole aren’t the same

Magnetic north can wander hundreds of miles

Van Allen BeltsCharged particles from

the Sun are captured by Earth’s magnetic field

An aurora is light radiated in the upper atmosphere because of impacts from charged particles --They produce “curtains” of visible light in the night skies

Next…Done - Earth: Inside and Out Next – The Moon: Earth’s

Fellow Traveler

Know about the Earth’s Interior

Know about the Earth’s Atmosphere

Know about the Earth’s Magnetic Field

The Earth – Inside and Out