If Earth's history is put on a scale of 1 yard (1 in = 100 million yrs), human civilization would have been around for

• less than one inch.
• 1 yard.
• 10 inches.
• 24 inches.

What is the breakdown of unstable isotopes into stable isotopes of other elements called?

• uncomformities
• relative dating
• Carbon-14
• radioactive decay

How far back in time can geologists study the history of the earth?

• 1.6 billion years
• 46 million years
• 4.6 billion years
• 160 billion years

What is the most accurate method to date very old rocks?

• uranium-lead method
• carbon 14 dating
• relative dating
• potasium-carbon dating

What is the largest division of time?

• eon
• epoch
• era
• period

What type of dating indicates a specific age of a rock by using methods such as carbon dating or Uranium 235?

• Relative Dating
• Absolute Dating

What type of dating indicates an approximate age of a fossil in relationship to other layers of rock in an area?

• relative dating
• absolute Dating
• radiometric dating

What forms when sediment fills in a cavity left by a dead organism?

• cast
• index
• trace
• mold

 What is the idea that geologic change occurs suddenly?

• uniformitarianism
• geologic breakdown
• catastrophism
• geologic column

What is the science that combines uniformitarianism and catastrophism?

• modern geology
• paleontology
• archeology
• ancient geography