Geologic Time

On the geologic time scale, eras are divided in to

• Epochs
• Periods
• Indexes
• Relative dates

In what era were dinosaurs the dominant species?

• 
  Cenozoic
• Paleozoic
• Mesozoic
• Quarternary

What was the earliest form of life?

• A reptile

• A fern

• A single-celled organism

• A human being

Approximately how long ago does Earth's history date back to?

• 12 bya

• 4.5 bya

• 2 mya

• 65 mya

The earliest forms of life appeared during the

• Paleozoic Era
• Cenozoic Era
• Precambrian Time
• Mesozoic Era

During which era did land fish and amphibians dominate?

• Paleozoic

• Mesozoic

• Cenozoic

• Precambrian

What is the current Era of time?

• Mesozoic
• Cenozoic
• the modern period
• Paleozoic

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

• Epoch, period, era

• Epoch, era, period

• Era, period, epoch

• Period, epoch, era

What event marks the end of each geologic area?

• impact catastrophe
• burst of new life forms
• mass extinction
• ice age

During which geologic time or era did humans first appear?

• Cenozoic
• Mesozoic
• Paleozoic
• Precambrian