Addie-Unit 3 Test

What are distinctive fossils used to establish and compare the relative ages of rock layers and the fossils they contain

• molds and casts

• carbon films

• mineralized remains

• index fossils

What scientist is credited with developing the principles of superposition, lateral continuity, and original horizontality

• James Hutton

• Nicholas Sterno

• Issac Newton

• Robert Oppenheimer

What principle states the same geologic processes that are happening today are the same processes that have been shaping the Earth throughout its history?

• lateral continuity

• uniformitarianism

• superposition

• original horizontality

What is measuring the exact age of an object in years?

• uniformitarianism

• superposition

• relative dating

• absolute dating

What are the unit of time into which eras on the Geologic Time Scale are subdivided?

• Eons

• Periods

• Centuries

• Epochs

What is the longest time unit in the geological time scale, measured in billion of years

• eras

• centuries

• eons

• periods

what is a break in Earth's crust of layers of rock?

• fault

• fold

• erosion

• intrusion

What is one of the three long units of geologic time between the precambrian and the present that is marked by mass extinction between them?

• periods

• eras

• eons

• centuries

What mass extinction ended the Triassic

• asteroid impact in Yucatan, Mexico. This caused a global cataclysm and rapid cooling

• underwater volcanic activity in the Central Atlantic Magmatic Province (CAMP) caused global warming and dramatic change in the chemical composition of the oceans

• intense volcanic activity in Siberia that caused global warming with elevated CO2 and sulfur levels.

• rapid growth and diversification of land plants generated rapid and severe global cooling.

What is finding out whether an object is younger or older than another object

• absolute dating

• uniformitarianism

• superposition

• relative dating