3.1 Pangea, Geological Time-Scale & Fossil Record

Front

What is Pangea?

Back

Pangea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras, where all the continents were joined together.

Front

What is the geological time scale?

Back

The geological time scale is a system used by geologists and paleontologists to describe the timing and relationships of events in Earth's history.

Front

What does the law of superposition state?

Back

The law of superposition states that in undisturbed rock layers, the oldest layers are at the bottom and the youngest layers are at the top.

Front

What is a fossil?

Back

A fossil is the preserved remains or traces of a once-living organism, often found in sedimentary rock.

Front

What era did trilobites live in?

Back

Trilobites lived during the Paleozoic era.

Front

What evidence supports the theory of continental drift?

Back

Evidence includes the shape of continents, similar fossils found on separate continents, and tree fossils found in unusual locations.

Front

Why is the fossil record important?

Back

The fossil record provides evidence of past life forms and helps scientists understand the history of life on Earth.

Front

What can scientists infer from fossils found in the same rock layer?

Back

Scientists can infer that the organisms likely lived during the same time period.

Front

What is the significance of the Paleozoic era?

Back

The Paleozoic era is significant because it saw the emergence of many life forms, including fish, amphibians, and reptiles.

Front

What are sedimentary rocks?

Back

Sedimentary rocks are formed from the accumulation of sediment, which can include minerals, organic matter, and other materials.