Earth History

Darwin developed this theory that species change over time?

After four half-lives there would be what ratio of Carbon-14 to Nitrogen-14

Plate boundary where 2 plates move apart

The feature that is formed in the oceans where a divergent boundary occurs.

This type of aging puts events in their geologic order

Thin layer of rock surrounding the earth is known as ________

What is the law that states layers above are younger than layers below?

The process of organisms changing over geologic time is

A ____________ is when forces within the earth forces layer up

Scientific evidence suggests the earth is how old?

The idea that earth’s crust is broke into sections that float and move on magma

A(n) __________________ occurs when forces within the earth force rock layers up

A(n) ______________ is when magma pushes through cracks in bed layers and cools underground.

Scientists believe this causes the plates to move.

Theory that continents move is know as __________.

Why does hot magma from the core move toward the surface?

The __________________ is approximately how old an object is in years.

Rock in the middle of the ocean, such as near a ridge, is _____ than the rock near the edges.

List 3 ways to preserve fossils or objects in their original form

A gap in the rock record indicated by a weathered surface is called a(n)

If 1/32 of the original C₁₄ is remaining and the ½ life is 6000 yrs how old is the sample.

Which of the following is an immediate result of tectonic plates shifting?