Fossils and Geologic Time

Front

The geologic time scale is subdivided into

Back

eras and periods

Front

Scientists developed the geologic time scale by studying ____________.

Back

rock layers and fossils

Front

Which major division of geologic time came first?

Back

Precambrian

Front

Which period of geologic time occurred most recently? Options: Cenozoic, Mesozoic, Paleozoic, Precambrian

Back

Cenozoic

Front

Over time, Earth’s rock hardened and formed land called ____________.

Back

Earth's crust

Front

The earliest multicelled organisms were: invertebrates, land plants, vertebrates, bacteria

Back

invertebrates

Front

What happened to cause a mass extinction at the end of the Mesozoic Era?

Back

An asteroid hit the earth.

Front

Evaluate Science in the Media: In a movie where early humans fight dinosaurs, how would you judge the scientific accuracy of that movie?

Back

Not accurate at all

Front

A leaf falls into a shallow lake and is rapidly buried in the sediment. The sediment changes to rock over millions of years. Which type of fossil would most likely be formed?

Back

carbon film

Front

Which of the following organisms lived during the Paleozoic Era? dinosaurs, humans, amphibians

Back

amphibians