Flashcardizz Review for Evolutionary History Unit Test

Front

What is a mold fossil?

Back

A mold fossil is a type of fossil that forms when an organism leaves an impression in sediment, which hardens into rock.

Front

What is a trace fossil?

Back

A trace fossil is a type of fossil that records the activity of an organism, such as footprints, burrows, or feces.

Front

What is a cast fossil?

Back

A cast fossil is formed when a mold fossil is filled with minerals or sediment, creating a replica of the original organism.

Front

What is a true form fossil?

Back

A true form fossil is an actual preserved remains of an organism, such as bones, teeth, or shells.

Front

What is a paleontologist?

Back

A paleontologist is a scientist who studies fossils to understand the history of life on Earth.

Front

Where is the oldest layer of rock strata typically found?

Back

The oldest layer in rock strata is usually found at the bottom layer.

Front

What is carbon-14 dating?

Back

Carbon-14 dating is a method used to determine the age of an object containing organic material by measuring the amount of carbon-14 it contains.

Front

How long does it take for half of the carbon-14 in a sample to decay?

Back

It takes approximately 5,730 years for half of the carbon-14 in a sample to decay.

Front

What does it mean if a sample contains 25% of its original carbon-14?

Back

If a sample contains 25% of its original carbon-14, it means that approximately 11,460 years have passed since the organism died.

Front

What is the significance of rock strata in understanding Earth's history?

Back

Rock strata provide a record of geological and biological changes over time, helping scientists understand the history of life and the environment.