Ch.11 Test
A CROSS SECTION OF EARTH REVEALS A LAYERED STRUCTURE THAT HAS DIFFERENT THICKNESSES AND DENSITIES. HOW DO GEOLOGISTS KNOW THIS?
From observing the transit times through the Earth of waves generated by large earthquakes
SONAR CONTRIBUTED TO INFORMATION ABOUT THE OCEAN BOTTOM BY
Giving scientist a way to map the bottom terrain
ACCORDING TO THEORY OF PLATES TECTONICS, OVER THE NEXT MILLIONS OF YEARS
A new ocean will form in the East Africa Rift Valley
NEW CRUST IS BEING GENERATED
In the rift valleys of the mid-ocean ridges
ACCORDING TO THE HOT SPOT THEORY, A HOT SPOT
Is a local rising column of magma
THE OUTERMOST SOLID LAYER OF THE EARTH THAT COMPRISES BOTH CONTINENTAL AND OCEANIC CRUST IS CALLED THE
Lithosphere
ONE CUBIC METER OF WHICH OF THESE WOULD WEIGH THE MOST
Mantle
MID-OCEANS RIDGES, RIFT VALLEY, AND TRENCHES ARE THOUGHT TO
Mark the boundaries between tectonics plates
A --- IS AN UNDERWATER MOUNTAIN RANGE WITH A --- RUNNING THROUGH THE CENTER OF IT
Mid-ocean ridge, Rift Valley
THE YOUNGEST SEAFLOOR ROCKS ARE FOUND
Near the rift valleys of the mid-ocean ridges
EARLIER THAN 200 MILLION YEARS AGO, THE CONTINENTS WERE JOINED INTO ON SUPERCONTINENT CALLED
Pangaea
THE MAGNETIC STRIPING OF THE SEAFLOOR IS CONSIDERED EVIDENCE OF SEAFLOOR SPREADING AND
Periodic reversals in the polarity of the Earths magnetic field
ACCORDING TO THE THEORY OF PLATES TECTONICS, AT A CONVERGENT BOUNDARY
Plates collide with each other
ACCORDING TO THE PLATES TECTONICS, AT A TRANSFORM BOUNDARY
Plates slides past each other
ACCORDING TO THE THOERY OF PLATE TECTONICS, AT A DIVERGENT BOUNDARY
Plates spread apart from each other
WHEN ISOSTATIC EQUILIBRIUM BECOMES DISRUPTED LANDMASSES WILL RESTORE THE BALANCE BY
Rising or failing along a fault
ACCORDING TO ROCKS ----- FORM WHEN ACCUMULATED ORGANIC AND INORGANIC PARTICLES ARE COMPRESSED AND CEMENTED TOGETHER
Sedimentary
ACCORDING TO THE THEORY OF PLATE TECTONICS, THE LITHOSPHERE CONSISTS OF
Several rigid plates that float on the asthenosphere
Pangaea is the theorized -- Panthalassa is the theorized --
Single continent hundred of millions of years ago, single sea that surround it
IF WEGENER COULD HAVE EXPLAINED --- HIS THEORY OF CONTINENTAL DRIFT MIGHT HAVE BEEN MORE WIDELY ACCEPTED IN HIS DAY
What forces could move continents
THE HOT, PARTIALLY MELTED, SLOWLY FLOWING LAYER OF THE EARTH IS CALLED THE
ASTHENOSPHERE
EVIDENCE WEGENER USED TO SUPPORT THE THEORY OF CONTINENTAL DRIFT INCLUDED
All of the above
THE THEORY OF CONTINENTAL DRIFT SAYS THAT
All the continents were once one continent that broke up drifted apart over hundreds of million of years
EVIDENCE FOR PLATE TECTONICS CAN BE SEEN IN
Ancient glaciers
THE EARTH'S YOUNGEST ROCKS ARE FOUND
At the mid oceans ridges
EVIDENCE OF SEAFLOOR SPREADING INCLUDES
BOTH A & C
WHY IS THE INSIDE OF THE EARTH STILL HOT
Because the decay of large radioactive elements is creating heat in the earths inner layers
ONE FORCE THAT DRIVES PLATE MOVEMENT IS
Convection
ONE PRIMARY FORCE THAT SCIENTIST THINK CAUSES PLATES TO MOVE IS
Convection
THE MID-OCEAN RIDGES ARE
Divergent plate boundaries
ACCORDING TO THE THOERY OF SEAFLOOR SPREADING NEW SEAFLOOR -- DUE TO --
Emerges from the Rift Valley, magma pushing up from the asthenosphere
GOING FROM THE CENTER OF THE EARTH OUTWARD, THE FOUR MAJOR LAYERS IN ORDER ARE
The inner core, the outer core, the mantle, and the crust
THE LITHOSPHERE IS
The uppermost solid portion of the mantle and the crust
A BOUNDARY IN WHICH CRUSTAL PLATES MOVE PAST ONE ANOTHER IS CALLED A
Transform Fault