Geologic Time Scale

How old is the earth?

• 2.5 million years

• 4.6 billion years

• 1.5 billion years

• 4.6 million years

method of determining the age based on measuring radioactive elements

• radiometric dating

• relative dating

• teenage dating

• no dating

A preserved remnant or impression of an organism that lived in the past.

• Hox Genes

• Common Ancestor

• Fossil

• Stasis

The fossil footprint of a dinosaur is an example of a(n)

• amber-preserved fossil

• natural cast

• trace fossil

• permineralized fossil

Which of the following is the correct sequence of geologic time from smallest to largest unit?

• era, eon, period, and epoch

• epoch, eon, era, and period

• epoch, period, era, and eon

• era, eon, epoch, and period

These were the dominant species that existed during the Paleozoic era:

• Dinosaurs and reptiles

• Aquatic life and reptiles

• Dinosaurs and aquatic life

• Ancient aliens

The first three eons were: Hadean, Archaean, and Proterozoic. They are better known as:

• PreCambrian Time

• Phanerozoic

• Mesozoic

• Cenozoic

What was the earth like during PreCambrian time?

• tropical climate with warm shallow seas

• vegetation and tectonic movement

• cooler temperatures because of nuclear winter

• intense volcanic activity, very warm temperatures

An index fossil meets all of the criteria except:

• Unique

• found across a few areas on Earth

• located in one rock layer

• lived for a brief period of time

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