Geologic Time

A scientist believes he found a fossil over 2 billion years old. What type of dating would he use to determine the fossils age?

• Carbon-14 Dating
• Potassium-40 Dating
• Uranium Dating
• Argon-56 Dating

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

• A
• B
• C

Which type of dating method can be used on rock layers by applying the Law of Superposition?

• relative dating
• absolute dating
• radioactive dating
• radiometric dating

Relative age of a rock is the number of years that have passed since the rock formed?            

• true
• false

Gaps in rock layers caused by erosion are called

• law of superposition
• unconformities
• uniformitarianism
• relative dating

The time it takes for half the atoms in an element to decay into something else is called

• absolute age dating
• relative age dating
• half-life
• extinct

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 2 things make a good index fossil?

• Good looks and a great smile
• widespread and on Earth of a short time
• widespread and on Earth for a long time
• only found in Clinton Twp and in every rock layer

A break in the Earths crust is a(n) 

• fault 
• intrusion 
• extrusion 
• index fossil 

Which of the following is the oldest?

• Layer A
• Intrusion D
• Intrusion H
• Layer E