Sodium chloride (table salt) is the most abundant salt dissolved in ocean water, contributing the most to its salinity.

The Pacific Ocean is surrounded by a belt of volcanoes and tectonic plate boundaries often referred to as the Pacific Ring of Fire.

Infiltration is the process by which water on the ground surface enters the soil.

The Challenger Deep is the deepest known point in the Earth's seabed, located at the southern end of the Mariana Trench.

Solar energy powers the water cycle by causing evaporation from oceans, lakes, and rivers.

Transpiration is the exhalation of water vapor through the stomata of plant leaves.

The Gulf Stream is a warm Atlantic current that transports heat from the tropics to Northern Europe, moderating its climate.

About 68% of the world's freshwater is locked in ice caps and glaciers, making it the largest reservoir of freshwater.

Thermohaline circulation refers to the global ocean circulation driven by density gradients created by surface heat and freshwater fluxes (thermo = heat, haline = salt).

The Abyssal zone is the layer of the ocean at depths of 4,000 to 6,000 meters, characterized by complete darkness and immense pressure.

Surface ocean currents are primarily driven by the friction between global wind systems and the surface of the ocean.

The Nile is traditionally considered the longest river in the world, stretching over 6,650 kilometers through northeastern Africa.

Sublimation is the process where a substance transitions from a solid directly to a gas without passing through the liquid phase.

The Dead Sea is one of the world's saltiest bodies of water, with a salinity concentration significantly higher than the open ocean.

Upwelling occurs when winds push surface water aside, causing nutrient-rich deep water to rise to the surface.

The Great Lakes of North America contain approximately 21% of the world's surface liquid freshwater.

Global sea level rises are primarily driven by the melting of glaciers and ice sheets combined with the thermal expansion of seawater as it warms.

A thermocline is a thin but distinct layer in a large body of fluid in which temperature changes more rapidly with depth than it does in the layers above or below.

Water vapor stays in the atmosphere for a very short duration compared to water in oceans or ice caps, with an average residence time of about 9 days.