Enhanced Science: 1st Quarter Exam

Earth’s lithosphere consists of layers, what are those?

It is made of a variety of solid rocks like sedimentary, metamorphic, and igneous. It has an average density of 2.8 g/cm3 and its thickness ranges from 5 to 50 km.

The crust is the outermost layer of the Earth.

What are the two kinds of crust?

The entire lithosphere of the Earth is broken into numerous segments called plates

The plates move very slowly but constantly, and this movement is called tectonics.

What are the three types of seismic waves released by an Earthquake?

It uses distance information from three seismic stations to locate the earthquake epicenter.

What is the formula to compute for the distance of an earthquake's epicenter from each seismic stations?

The places on Earth where most of the earthquakes originated or some mountains and volcanoes were formed mark the boundaries of each lithospheric plate.

What are the three distinct types of plate boundaries, which are differentiated by the type of movement they exhibit?

The denser oceanic crust (Plate A) undergoes what we call subduction process or the bending of the crust towards the mantle.

What is the deepest part of the ocean?

The subduction of plate can cause earthquakes at varying depths.

Converging oceanic plates will cause formation of trenches, and these trenches will become sources of earthquakes.

A series of ocean waves with very long wavelengths (typically hundreds of kilometers) caused by large-scale disturbances of the ocean.

Volcanic island arc is a chain of volcanoes positioned in an arc shape.

Many parts of the Philippines originated from oceanic-oceanic convergence. This resulted from the collision of two oceanic plates, with one of the plates diving under the other.

When two continental plates converge, a collision zone is formed.

What plate boundary is formed when they tend to move apart?

When a spreading center develops within a continent, the crust may break into several segments.

A type of plate boundary that resembles the strike-slip fault.