Geologic Time

Which of the following statements about the fossil record is true?

• all organisms become fossils
• organisms having soft body parts make up most of the fossils
• all organisms that have shells become fossils
• the fossil record is incomplete

The disappearance of a species.

• Evolution
• Extinction
• Migration
• Mutation

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

What type of rock do fossils form in?

• Igneous
• Sedimentary
• Metamorphic
• Classic

A scientist who studies fossils is called a what?

• Fossilologist
• Rock Hound
• Archeologist
• Paleontologist

Scientists chose where units of geologic time began and ended based on major changes in life forms at certain times.

• true
• false

How old do Paleontologists believe the Earth is?

• 2015 years old
• 3.6 billion years old
• 4.6 billion years old
• 4.6 million years old

The dinosaurs and reptiles were dominant in which Era?

• Precambrian
• Mesozoic
• Paleozoic
• Cenozoic

Which is the most recent era of time- the one that we are currently in?

• Mesozoic 
• Paleozoic 
• Cenozoic 
• Precambrian 

The Law of Superposition helps scientists to determine what?

• The absolute age of rock layers
• The age of fossils
• The relative age of rock layers
• the super powers of rocks