Liberty Geologic Time Flashcard

Front

What type of rock do fossils form in?

Back

Fossils primarily form in sedimentary rocks, which are created by the accumulation of sediments over time.

Front

Which organisms lived before/after/or at the same time?

Back

This question can be answered by studying fossil layers, which provide a timeline of when different organisms existed.

Front

What provides information about the history of life on earth?

Back

The fossil record provides crucial information about the history of life on Earth, showing how organisms lived and evolved over time.

Front

In which Era were dinosaurs and reptiles dominant?

Back

Dinosaurs and reptiles were dominant in the Mesozoic Era.

Front

According to the law of superposition, which layer is the youngest?

Back

The law of superposition states that in undisturbed layers of rock, the youngest layer is at the top.

Front

What is sedimentary rock?

Back

Sedimentary rock is a type of rock formed by the accumulation and compaction of mineral and organic particles.

Front

What is the fossil record?

Back

The fossil record is a historical archive of life on Earth, consisting of all the fossils that have been discovered.

Front

What is the significance of studying fossil layers?

Back

Studying fossil layers helps scientists understand the chronological order of life and the relationships between different organisms.

Front

What does the term 'extinction' mean?

Back

Extinction refers to the end of an organism or a group of organisms, meaning they no longer exist.

Front

What is the Precambrian Era?

Back

The Precambrian Era is the earliest part of Earth's history, covering about 88% of the planet's geological time.