Geologic Time Scale Jeopardy~ :)

Definitions

100

_________ is the death of every member of a species

extinction

200

___________ is the extinction of many species at the same time

mass extinction

300

The age of an event or object in relation to other events or objects is called ______________

Relative age

400

The oldest sections are shown on the __________, and the recent sections would be on the ________.

bottom/top?

500

This event was the relatively rapid appearance (over a period of many millions of years) of many animal and plant species.

Cambrian explosion

Geologic Time Scale

100

Name the time in Earth's history: Clue #1: 4.6 billion to 542 million years ago Clue #2: no Oxygen in air

Precambrian

200

Name the time in Earth's history: Clue #1: 251 million years ago Clue #2: Age of Reptiles

Mesozoic era

300

Name the time in Earth's history: Clue #1: 65 million years ago to today Clue #2: fossils are in the top layer

Cenozoic era

400

Name the time in Earth's history: Clue #1: Humans first appeared

age of mammals

500

The first trace of life on earth can be traced back to..

3.8 billion years ago.

Grab Bag

100

True/False: Humans have existed for most of Earth’s history.

False.

200

How is the geologic time scale of Earth’s history divided?

by major events or changes.

300

True/False: Throughout Earth’s history, the number and type of life forms has remained fairly constant.

False.

400

Mass extinction can happen when ..

Gradual changes in the climate or ocean currents OR huge events like a meteor falls from the sky and makes giant hole in the ground, kicking up dirt and soil into the air that blocks out the sun for a long time until plants die. Then when a lot of plants die, animals that eat plants have no food, and they die too.

500

Give an example of creatures that were victims of a mass extinction

dinosaurs

Divisions of Geologic Time

100

The largest division of geologic time are ______________.

eons

200

Eons are divided into __________.

eras

300

Eras are divided into __________.

periods

400

Periods are divided into ____________.

epochs

500

There are _____ eons in Earth’s history.

four

Fossils

100

How did scientists know what dinosaurs looked like?

fossil evidence

200

The earliest fossils are of …

One-celled organisms

300

A fossil is an object that contains traces, remains, or evidence of ..

Living things from long ago

400

A well-known fossil group of extinct marine creatures that first appeared in the early Cambrian period.

trilobite

500

The soft parts of an organism often decay very quickly. The result is that many fossils..

Only preserve traces of the hard parts of the organism.