Alfred Wegener
What is the scientist who came up with the theory of the continental drift
A weak spot in the earth crust where molten magma, rock fragments and hot gases erupt
the point below the surface where the rocks first begin to move
what is the focus
a thin layer of cool rock that contains continental and oceanic crust
What is the crust
occurs when the moon directly blocks the sun light and casts a shadow
what is a solar eclipse
the theory that all continents were once together
What is the continental drift
liquid rock at the earth's surface
what is lava
the point on the surface directly above the focus
what is the epicenter
made of magma; and consist of 2 layers, upper and lower
What is the mantle
2.7802 billion mi
a super continent that existed 225 million years ago
What is Pangaea
liquid rock below the earth's surface
what is magma
seismic wave that is a push or pull of the ground
what is primary (p) wave
A swirling layer of molten nickel and iron. Moves slowly creating earth's magnetic field
What is the outer core
A Protostar
What evidence backs up the continental drift theory
is erupting or shows signs it may erupt
what is an active volcano
seismic wave that shakes the ground side to side and up and down
What is secondary (S) waves
A dense ball of solid nickel and iron that is under high heat and pressure
What is the inner core
stellar nebula then to an average star then to a red gaint
What is the life cycle of a star
the lithosphere is broken into small pieces
What is tectonic plates
shield volcano, cinder cone and composite volcanoes
what are the 3 types of volcanoes based on shape
what is surface wave
80 Km
Mercury