Exam 1: An Introduction to Geology and Plate Tectonics

The continental crust is heterogeneous but is predominantly made of ________ and averages ________ thick.

The Earth's core was formed from ________.

The Earth's atmosphere serves to ________.

"The present is the key to the past" is the uniformitarian concept that ________.

Human activities like damming rivers, building seawalls, tilling land, strip mining, refining ores, burning fossil fuels, and disposing of garbage ________.

What were Wegener's four main lines of evidence to support his continental drift hypothesis?

The Mantle extends from < 100 km to about ________ and is bounded at both its top and bottom by ________.

What is the estimated temperature of Earth's inner core?

The composition of the core of Earth is thought to be ________.

The ________, about 100 km thick, is the coldest, most rigid, and most brittle layer in the Earth.

Compared to the age of the Universe of about 14 billion years, the currently accepted age of Earth is about ________ years as determined by using radioactivity for dating rocks and minerals.

Examine the words and/or phrases for each question below and determine the relationship among the majority of words/phrases. -Choose the option that does not fit the pattern.

The oldest rocks on the seafloor are much younger than the oldest rocks on the continents.

New seafloor is created at ________ plate boundaries.

Tethys was ________.

Ocean crust is generally lower in elevation ________.

Internally, the Earth consists of spherical shells with different compositions and densities.

________ are the three, basic categories of rocks in the rock cycle.

Which one of the following is a logical consequence of the rapidly growing human population?

Sea-floor spreading occurs at ________ boundaries.