What is the longest era and the first period of the Earth?

Where were the first organisms found on Earth?

Fossils were _____ in the Precambrian Era
(Abundant/Common/Rare)

What major event occurred in the Carboniferous Period?

In what era would Precambrian belong in?

What ERA are we in NOW?

What era were the earliest dinosaurs?

Birds first appeared in the ________ Era

What period and era did the earliest dinosaurs rome the Earth?

In what era would Tertiary belong in?

How many periods have there been since the Earth was formed?

The earliest fish appeared in what era?

________ were the earliest of their kind during the Triassic Period

What period and era were the earliest flowering plants discovered?

In what era would Jurassic belong in?

What PERIOD are we in NOW?

What era did the first mammals appear?

_______ lasted for 3,000-9,000 Million Years

The earliest terrestrial plants and animals would have been found in what period and in what era?

In what era did the first unicellular organisms appear?

Which age has the most periods?

Trilobites are a well-known fossil group of extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest known groups of arthropods. In what period would this organism have existed?

______ was the era that lasted for 180 Million Years

In what era did the Ice Age occur in?

In what era would the first humanoids(early human ancestors) appear?