EARTH AND SCI

Glomar Challenger

________ was made to help Harry Hess with the theory of Seafloor Spreading by taking rock samples.

Lystrosaurus

________- land reptile found in India, Africa and Antarctica.

convection currents

The ________ move the plates in the fluid molten mantle.

Gondwana Sequence

________- rocks and fossils found in continents located in Southern Hemisphere that exhibit identical pattern.

Seafloor

________ spreading occurs along divergent plate boundaries at areas called mid- ocean ridges.

Glossopteris

________- fossil fern found in South America, Antarctica, Australia, India and Africa.

Cynognathus

________- A fossil of land reptile found in South America and Africa.

geological process

Is a(n) ________ in which lithospheric plates split apart from each other.

Rocks

________ that make up the ocean floor lie in a pattern of magnetized stripes which hold a record of the reversals in the magnetic field.

Mesosaurus

________- freshwater reptile found in Antarctica and South America.

Plates

________- broken sections /pieces that move on top of the liquid mantle.

thick plate

Creates a rift because the pull- apart is not vigorous enough to create a clean, single break through the ________ material.

mid ocean ridge

A(n) ________ is a seafloor mountain system formed by plate tectonics.

Fossils

________ are traces and remains of organisms that lived in pre- historic times.

oceanic crust forms

Is a theory that ________ along submarine mountain zones, known collectively as the mid- ocean ridge system, and spreads out laterally away from them.

magma

When the ________ reaches the surface, it cools and sinks back down creating a circular pattern of movement.

Plate tectonics

________ is the generally accepted scientific theory that considers the Earth's lithosphere to comprise a number of large tectonic plates which have been slowly moving since about 3.4 billion years ago.

LESSON 2

Tectonic Processes

Lystrosaurus

land reptile found in India, Africa and Antarctica

Mesosaurus

freshwater reptile found in Antarctica and South America

Glossopteris

fossil fern found in South America, Antarctica, Australia, India and Africa

Cynognathus

A fossil of land reptile found in South America and Africa

Gondwana Sequence

rocks and fossils found in continents located in Southern Hemisphere that exhibit identical pattern

Plates

broken sections/pieces that move on top of the liquid mantle

Harry Hess (1906

1969), American geologist

Oldest Seafloor

280 million yrs old

Oldest rock in land

3 billion yrs old

Continental

Continental

subduction

when Dense oceanic plate slips beneath a less dense continental plate