Geological Time Scale

The ice age is apart of what era?

is the division of Earth’s history based onlife forms  that lived during thatperiod. 

Which layer is the oldest?

When samples are taken from the Earth, what are they called? 

Dinosaurs and birds are to said to have evolvedduring the Mesozoic Era. 

What is radioactive dating?

Express the following in Scientific Notation 12,000,000

Which layer is the youngest?

The age of reptiles began in which era?

Geologist understand that the oldest layers are on the bottom and the newestare on the top. 

What are the longest subdivisions of the Geological Time Scale? 

Explain half-life

Express the following in Scientific Notation 345,000,000

There are 300 atoms of Carbon¹⁴, after 5,700 years how many atoms would be Nitrogen¹⁴?

Which era created major mountain ranges, produced thebeginning and then end of the Ice Age? 

If layer A is 5,000 years old and layer C is 10,000 years old how old is b?

Which period is from the Mesozoic Era? 

Which era ended with a comet orasteroid colliding with Earth.

The relative age of something is the exactnumber of years since an event has occurred. 

Which era created the Appalachian Mountain range whichlead to the production of coal. 

Express the following in Standard Notation 5x10⁸

A geologist studies.....

The exact age of rocks is called....

During which era did pangaea break up? 

What era is this organism from?

What law of geology state that sedimentary rocksare deposited horizontally ? 

What is relative dating?

Which era is trilobites and brachiopods from?

Strata means.....

Which era occurred the longest on the geological time scale?