Earth and Environmental study guide.

Which of the following is the most recent evidence of plate tectonics?

volcanic activity and sea floor spreading on the at the mid- oceanic ridge.

The sediments found in a riverbed are MOST likely a result of which action on nearby rock?

weathering

Florida has a large supply of phosphate that ancient seas deposited millions of years ago. The phosphate contains the remains of animals that were deposited in layers on the sea floor. Which type of rock did the phosphate become?

Sedimentary

Which of these best explains how tectonic plate movement causes the movement of mountain ranges.

Convection currents in the mantle cause two plates to collide forming the mountains.

Which feature does not form as a result of tectonic plates diverging.

Mid-Ocean ridge

Which feature form when magma emerges between two diverging points.

Mid-Ocean ridge

Vein deposits of gold and silver are often formed in areas that have experienced which geologic process?

Percipitation

What MOST likely led to the formation of the North American continent?

The tectonic plates separated and moved away from each other.

How is the theory of plate tectonics different from a hypothesis regarding a certain aspect of plate movement?

The theory explains a number of related observations.

Sedimentary deposits formed from organic material tend to include a high amount of

carbon

Which process is included in the formation of both metamorphic and sedimentary rock?

compaction

The formation of diamonds requires tremendous pressure that is generated

deep below the crust.

Geologists were examining an area in Africa called the Great Rift Valley. Which geologic event MOST likely caused the formation of the valley?

diverging continental plates

The abundance of a mineral at the surface of Earth MOST likely depends upon the

element availability

Most mountains on Earth occur in huge ranges stretching for thousands of miles. Which event is MOST likely to cause the formation of these mountain ranges?

movement of plates

Over time, non-volcanic mountains can form due to the interaction of plate boundaries. Which interaction is MOST likely associated with the formation of non-volcanic mountains?

oceanic plates separating from oceanic plates