Timeline of the history of Earth from the Paleozoic

How old do Paleontologists believe the Earth is?

• 2020 years old

• 3.6 billion years old

• 4.6 billion years old

• 4.6 million years old

What type of event usually marks the end of an Era

• A Mass Extinction

• A Quinceanera

• An earthquake

• A Volcanic Eruption

What era did trilobites, fishes, and other marine organisms dominate?

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

The dinosaurs and reptiles were dominant in which Era?

• Precambrian

• Mesozoic

• Paleozoic

• Cenozoic

The time span that lasted the longest was the...

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

During which era did the earliest dinosaurs appear?

• Cenozoic
• Paleozoic
• Mesozoic
• Precambrian

The Geologic Time Scale is a record of what?

• old geologists
• sweet geology music
• the known history of rocks and fossils
• a list of every living thing ever

Which of the following correctly lists the geologic time  periods in order from OLDEST to MOST RECENT?

• Precambrian, Mesozoic, Paleozoic, Cenozoic
• Cenozoic, Mesozoic, Paleozoic, Precambrian
• Precambrian, Paleozoic, Mesozoic, Cenozoic
• Mesozoic, Paleozoic, Precambrian, Cenozoic

On the geologic time scale, eras are divided in to

• Epochs
• Periods
• Indexes
• Relative dates

Which is the correct order to time units from smallest to largest?

• Epoch, period, era, eon

• Epoch, era, period, eon

• Eon, era, period, epoch

• Period, eon, epoch, era