ch.2

india, asia

A moving ----- collided with a stationary ----- about 30 million years ago.

increase in volume

What would happen to Earth if ocean floor were created at divergent boundaries at a faster rate than it is destroyed at convergent boundaries?

oceanic-continental plate convergence

When an oceanic plate converges with a continental plate, the oceanic plate, being denser, subducts to form volcanic mountains.

continental-continental plate convergence

When two continental plates converge, neither of them subducts as they have a density that is much lower than the mantle, resulting in the formation of a collisional mountain chain.

oceanic-oceanic plate convergence

When two oceanic plates converge, the denser of the two subducts into the mantle. The subduction results in the partial melting of lithospheric rock above the area of subduction, leading to the formation of volcanoes.

earths surface

Where are tectonic plates located?

along the crest of mid ocean ridges

Where is the youngest ocean floor found?

ocean trenches and volcanoes

Which geologic features are associated with convergent boundaries?

mid ocean ridges and continental rift valleys

Which geologic features are associated with divergent boundaries?

the himalayas

Which mountain belt lies to the north of India?

Hawaiian islands

Which of the following is an example of modern-day mantle plume volcanism?

transform

Which plate boundary is NOT associated with volcanic eruptions

convergent boundary

Which type of plate boundary exists between India and Asia today?

both countries have similar densities

Why didn't India subduct under Asia?

false

True/False: The San Marcos/Escondido area is located on the North American Plate.

a row of volcanoes that forms on the overriding plate near a subduction zone

What is a volcanic arc?

The crust is part of the lithosphere

What is the relationship between the crust and lithosphere?

divergent

Iceland is located on what type of plate boundary?

lithosphere, asthenosphere

Tectonic plates are pieces of the ________ that float on the more fluid ________ below.

separate from eachother

transform faults causing earthquakes occur where plates

mantle plume

upwelling of abnormally hot rock within the Earth's mantle

true

Areas of intense volcanic activity that remain in more or less the same location over long periods of geologic time and are unrelated to plate boundaries are called hotspots ( true or false ).

moving toward

Complete this statement: Divergence is to moving away as convergence is to

ocean basin between the two continents subducted under asia

Did any subduction occur during the collision of India and Asia?

folded and faulted rock

In general, what are the Himalayan mountains composed of?

fault

The earthquakes that occur in Southern California generally occur above a

true

The majority of the world's hotspots are associated with plate boundaries. (true or false)

seafloor spreading

The slowly increasing distance between South America and Africa is due to

subduction zones

island arcs occur in?

false

oldest seafloor is the closest the center of the mid ocean ridge (true or false)