Earth Science

Advection refers to the horizontal transfer of heat or other atmospheric properties by the movement of air. Conduction is heat transfer through direct contact, convection is vertical heat transfer by fluid movement, and absorption is the uptake of energy, not transfer.

Tsunamis are primarily caused by the sudden deformation of the sea floor, which leads to a vertical displacement of a large volume of water, generating powerful waves. This is typically due to undersea earthquakes or volcanic activity, not by gravitational pull, atmospheric pressure, or wind changes.

The coldest region of the Earth's atmosphere is the mesopause, which is the boundary between the mesosphere and the thermosphere. Temperatures at the mesopause can drop to around -90°C, making it colder than the other atmospheric layers listed.

The point within the Earth where an earthquake originates is called the focus (or hypocenter). The epicenter is the point on the Earth's surface directly above the focus. Therefore, option D is correct.

Most weather phenomena, such as clouds, rain, and storms, occur in the troposphere, which is the lowest layer of the atmosphere where temperature decreases with altitude and where most atmospheric water vapor is found.

Earthquakes most commonly occur at plate boundaries where tectonic plates interact, causing stress and resulting in seismic activity. While ocean beds can be near plate boundaries, and the term 'plate surface' is vague, the most accurate and specific answer is 'Plate boundaries.'

The Earth is composed of four main layers: the crust, the mantle, the outer core, and the inner core. This layered structure is fundamental to understanding Earth's geology.

Granite is an igneous rock formed from the slow crystallization of magma beneath the Earth's surface, making option B correct.

Earth is divided into three main layers: the crust, the mantle, and the core. These layers differ in composition and physical properties, making option D the correct choice.

The magnitude of energy released by an earthquake is measured using the Richter scale, which quantifies the size of earthquakes based on seismic wave amplitude.