7th Grade Ch.5 Review

according to Wegener's hypothesis of continental drift....

subduction occurs where oceanic crust bends down toward the mantle at a ______________.

along a transform boundary, two plates slip past each other, moving in opposite directions.

the hypothesis of __________ was that all the continents once were joined as a single landmass

mid-ocean ridges form the shortest mountain ranges on Earth. t or f?

the lithosphere is broken into sections called _________which float on top of the asthenosphere

the process of ______________continually adds new crust to the ocean floor along boths sides...

place where 2 plates slip past each other, moving in opposite directions is known as a ....

geological theory that states that pieces of Earth's lithosphere are in constant slow motion is

Alfred Wegener used data from landforms, fossils, & climate to hypothesize continental drift.

when continental plates pull apart at a divergent boundary on land a __________forms.

in sea-floor spreading, molten material rises from the mantle and erupts...

what is pangaea?

what technology did scientists use in the mid-1900's to map the mid-ocean ridge?

if subduction occurs faster than oceanic crust can be created, an ocean will shrink?

any trace of an ancient organism that has been preserved in rock is called a...

most geologists think that the movement of Earth's plates is caused by...

old oceanic crust is more dense than new oceanic crust because it is....

a collision between two pieces of continental crust at a converging boundary produces a...

oceanic crust near the mid-ocean ridge is older than oceanic crust farther away from the ridge.