Geologic Time review Chapter 4

Which fossil is a replica of the original shape of the organism?

• cast
• mold
• trace
• preserved remains

Which fossil is an impression left by the original organism?

• cast
• mold
• trace
• preserved remains

Relative dating of rock layers tells us that the deeper we dig, _______.

• the younger the rocks get
• the smellier the rocks get
• the harder the rocks get
• the older the rocks get

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

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

Why is the fossil record incomplete?

• fossils get eroded away over time
• most organisms never became fossils
• scavengers and decomposers eat them too quickly
• all of the above

According to the law of superposition, which layer is the youngest?

• A
• B
• C

Paleozoic, Mesozoic & Cenozoic are all

• Epochs
• Eras
• Periods
• Eons

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

• Mesozoic 
• Paleozoic 
• Cenozoic 
• Precambrian 

Fossils in which minerals replace all, or a part, of an organism is what kind of fossil?

• Petrified Fossil
• Preserved
• Fault
• Intrusion