Exam 1: The Dynamic and Evolving Earth

The universe is presently contracting.

The two types of Earth's crust are known as lithospheric and oceanic.

Scientists use the term ____________________ to analyze and gather facts and data about a problem in a rational, orderly manner.

Provide a brief discussion of the internal structure of Earth. What are the physical characteristics of each of the layers? What caused the "differentiation" of early Earth?

Historical geology can best be described as the study of ____.

Theories are factually stronger than hypotheses.

Our solar system is part of the ____________________ Galaxy.

A tectonic plate can consist of continental crust or oceanic crust, but not both.

The geologic time scale was originally based upon ____.

The central thesis of the theory of organic evolution is that the current diversity of species on Earth is the same as that of the past.

Explain one way in which the hydrosphere, biosphere, and atmosphere each interact with or affect the lithosphere.

Solar system planets are classified as either ____________________ or ____________________ planets based upon their chemical and physical properties.

The science of geology is divided into two broad areas: ____________________ geology and ____________________ geology.

Which part of the upper mantle behaves plastically and flows slowly?

Which statement about the asthenosphere is false ?

Natural selection refers to the survival of organisms that are best adapted to their environment.

The oceanic crust is composed mostly of ____.

Earth becomes ____ with increasing depth.

Provide a brief discussion of the theory of organic evolution. What evidence supports this theory?

Prior to differentiation, Earth was a molten homogenous mass. What three sources of heating were responsible for Earth's molten state? Which source contributes to Earth's internal temperature today?