Geologic time

Which scientific idea explains Earth's history as a series of disastrous events that occurred over short periods of time?

• catastrophism

• cross-cutting relationships

• uniformitarianism

Which scientific principle states that geologic processes that occur today are similar to those that have occurred in the past?

• uniformitarianism

• catastrophism

• lateral continuity

The actual age of geologic event is the ​ ​ _____________

A stack of books rests on the floor. Using the concept of relative-age dating, the book on the bottom of the stack was the first book to be placed on the floor.

• True

• False

An early scientific idea called ______________________ explains Earth's history as a series of disastrous events that occurred over short periods of time.

The principle of ____________________ states that geologic processes that occur today are similar to those that have occurred in the past.

The concept of ______________________ is the basis for understanding Earth's past.

• Magma

• fossils

• geology

• uniformitarianism

Which is an example of relative-age dating?

• In a pile of fallen leaves, the last leaves to fall from a tree will be found on the bottom of the pile.

• In a pile of fallen leaves, the last leaves to fall from a tree will be found in the middle of the pile.

• In a pile of fallen leaves, the last leaves to fall from a tree will be found on the top of the pile.

What is the age of rocks and geologic features compared with other rocks and geologic features nearby?

• relative age

• geologic age

• absolute age

Which concept is the basis for interpreting Earth's past?

• uniformitarianism

• evolution

• catastrophism