Extinctions
All the Time
Earth Through Time
Everything Living
and not living too
100

What occurs when a large number of species occur during a relatively short period of time?

mass extinction

100

The largest division of the geologic time scale is the era is an __.

Eon

100

What do we call the time when Earth was all one land mass?


Pangaea

100

In what geologic period are all things living today?



Quaternary period

100

Determining whether a fossil formed before or after another fossil is:  

relative dating


200

During which period did the dinosaurs become extinct? [double click if you can tell how long ago they became extinct]


Cretaceous and Tertiary (tricky right!)

65 million years ago (more or less)

200
In what Era do we currently live?           [double click if you give the period; triple click if you give the epoch]


Era - Cenozoic

Period - Quaternary                             Epoch - Holocene



200

Pangaea occurred between 280 MYA and 230 MYA.  What organisms dominated at that time?


reptiles OKA dinosaurs!


200

Most fossils are preserved in __ rock.

sedimentary rock

200

What do we call a scientist who studies the history of life on Earth through the fossil record?

a Paleontologist


300

Which mass extinction killed the highest percentage of species?


Permian extinction (95%)

300

What does relative dating tell you about fossil 'C'.  

It's older than fossil A and B, and younger than fossil D.

300

The Earth has changed from Pangaea to the present configuration because of what process? [hint: mantle ___]


convection

300

What organisms dominated during the Mesozoic Era? 

[double click if you can name it's three periods]



dinosaurs!

Triassic, Jurassic, Cretaceous


300

What process determines the age of a fossil in years?

[double click if you can tell what kind of material is used to find the ages]

absolute dating

radioactive materials

400

Which mass extinction led to the death of Crinolds?


 

became:

400

How old is Earth according to the scale?


4.5 billion years old

[4,540 thousand million years old]

400

These occur most often at boundaries between tectonic plates, mostly along a belt, called the “Ring of Fire” that encircles the Pacific Ocean. 

What are they called?


volcanoes


400

What two divisions of the Geologic Time Scale are determined by the life that dominated then?


Eras and Periods

400

What is an example of an event that could cause a mass extinction?


increased volcanic activity

an asteroid collision                                 meteor showers                                             solar super flare


500

Name three organisms that became extinct during the Ordovician extinction.



too many to type

500

When did the Paleozoic Era begin and end?



450 MYA - 250 MYA

500

What mountain range began when the Indian Plate collided with the Eurasian plate?

[double click if you can tell what type of mountains]


Himalayan 

folded mountains


500

Name this index fossil.

[double click if you can tell what an index fossil is]

Trilobite

Index Fossil -  any fossil that is characteristic of a particular geologic time period

500

Why is it difficult to tell which fossils are older?


The layers of strata are broken, uplifted and subsided.

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