8th Gr Unit 6 Vocab Review

The liquid part of the core

Layer of solid brittle rock that makes up the Earth's surface

The solid part of the core

Line of volcanoes on an oceanic plate above a subducting oceanic plate, near a deep sea trench

A slab of Earth’s lithosphere that can move around the planet’s surface

The middle layer of Earth

Crust that makes up the continents

An area with no active volcanoes or earthquakes

2 plates move towards each other

Record of all earthquakes

Hypothesis developed in the early 20th century that states the continents move on the surface of Earth

Area where two lithospheric plates come together and one sinks beneath the other

2 plates move away from each other

Fragment of a planetary body that hits earth

Volcanic mountain ranges near the coast of a continent

Layer made of hot rock that circulates by convection

The sinking of one lithospheric plate beneath another

The region around Earth that interacts with magnetic forces

A thin brittle outer shell

Device that uses sound waves to measure the depth of the seafloor

Waves of energy radiate from an earthquake’s center

Layer composed of the crust and the uppermost mantle

A deep hole in the seafloor where subduction takes place

Made out of basalt lava that flows onto the sea floor

When the poles are like they are now

When two poles are switched

The movement of lithospheric plates

Location where two plates meet

Process by which new seafloor forms at ridges pushes lithospheric plates on the Earth’s surface

Dense, center of earth

Layer of solid fluid material below the lithosphere

Transfer of heat without contact

Transfer of heat through contact

Geologic activity that takes play away from plate boundaries

Made up of many different rocks

2 plates slip past each other

the part of Earth's crust that underlies the ocean

An area with a lot of volcanoes and earthquakes

A divergent plate boundary that forms in the middle of a continent

Sound waves that traveled in all directions and bounced off the nearest object