continental drift/parts of the earth

Continental Drift

The theory that continents were once joined together and have since moved apart.

Alfred Wegener

The meteorologist who proposed the theory of Continental Drift.

Pangea

The supercontinent that existed when Earth's landmasses were joined together.

Jigsaw fit of the continents

The observation that the coastlines of continents, such as South America and Africa, fit together like puzzle pieces.

Fossil Correlation

The concept that similar fossils found on different continents support the idea of continental drift.

Glacial Striations

Marks left by glaciers that indicate the direction of ice movement in the past.

Tectonic Plates

The large slabs of the Earth's lithosphere that are constantly moving.

Plate Tectonics

The theory that explains the movement of tectonic plates and its relationship to geological phenomena.

Earthquake

A sudden release of energy in the Earth's crust often linked to tectonic plate movement.

Lithosphere

The outer layer of the Earth composed of the crust and upper mantle.

Asthenosphere

The semi-fluid layer beneath the lithosphere where convection currents occur.

Seismometers

Instruments used to detect and record ground shaking, particularly during earthquakes.

Magnetometers

Devices that measure magnetic fields and have been used to detect magnetic variations near undersea ridges.

Rock & Mountain Correlation

The evidence that similar aged rocks and mountains are found on different continents, suggesting they were once connected.

Molten Rock

The hot, liquid rock located beneath the Earth’s crust.

Paleoclimate Data

Evidence from past climates, such as glacial structures, that supports the theory of plate tectonics.

Convection Currents

The movement of fluid caused by differences in temperature and density, occurring within the mantle.

Supercontinent Cycle

The cyclical process of continents coming together to form supercontinents, such as Pangea Proxima in 250 million years.

Universal Rejection

The initial dismissal of Wegener's theory due to his background as a meteorologist.

Fossil Evidence in Continental Drift

The idea that similar fossils on different continents indicate they were once connected.

Oceanic Crust

The portion of the Earth's crust that covers the ocean basins.

Continental Crust

The part of the earth's crust that forms the continents.

Earth's Magnetic Field

The magnetic field surrounding the Earth, which is recorded in rocks as they form.

Seafloor Spreading

The process by which new oceanic crust forms at mid-ocean ridges as tectonic plates pull apart.

Subduction Zones

Areas where one tectonic plate is being forced under another.

Tectonic Boundary

The edges of tectonic plates where interactions occur, often resulting in earthquakes.

Plate Movements

The slow, steady motion of tectonic plates driven by convection currents in the mantle.

Evidential Observations

The data and phenomena observed that support the theories of continental drift and plate tectonics.

Technological Advances in Geology

Improvements in technology, such as seismometers and magnetometers, that have enhanced the study of Earth's structure.

Paleomagnetism

The study of the record of Earth's magnetic field in rocks, sediment, or archaeological materials.

Geological Features

Landforms and structures on Earth that provide evidence for tectonic plate interactions.

Movement of Continents

The gradual process by which continents shift positions on the Earth's surface over time.