Geologic Time

The Scientific Law that tells us the oldest rock layers will be on the lowest level of sedimentary formations is called - 

• Law of Uniformitarianism
• Law of Cross-Cutting
• Law of Superposition
• Law of Catastrophism

The radioactive decay of material can be used to determine the age of fossils. This is called - 

• Absolute dating
• Relative dating
• Complete dating
• Fossil dating

The amount of time it takes for one half of a radioactive sample to decay is known as 

• Relative Life
• Half Decay
• Half Life
• Absolute Life

The type of fossil that is widespread over a large geographical range over a short geologic time frame is called a - 

• Marine Fossil
• Relative Fossil
• Index Fossil
• Trace Fossil

The picture is an example of what kind of dating?

• Absolute
• Relative
• Fossil
• Geologic

Which layer is the youngest?

• A
• B
• C
• D

Rocks found on land are up to 3.8 billion years old, but those in the ocean are no more than 180 million years old. Using the information shown, during which era could parts of the ocean floor have formed?

• Mesozoic
• Jurassic
• Paleozoic
• Cenozoic

What is the order of the eras from the earliest to the most recent time period?

• Cenozoic -> Mesozoic -> Paleozoic
• Paleozoic -> Mesozoic -> Cenozoic
• Paleozoic -> Cenozoic -> Mesozoic
• Cenozoic -> Paleozoic -> Mesozoic

___________ a record of the geologic events and the evolution of life forms as shown in the fossil record. 

• Eras
• Geologic Time Scale

This was known as the era of the reptiles.

• cenozoic
• mesozoic
• precambrian
• paleozoic