The symbol for the chemical element xenon, a noble gas used in lighting and anesthesia.

A constant that expresses the degree of ionization of water at a given temperature, typically used in calculations involving acid-base…

The process by which plants absorb water through their roots, driven by osmotic pressure and transpiration.

A network of water-filled canals in echinoderms (like starfish) used for locomotion, feeding, and respiration.

The speed at which a wave travels through a medium, often referring to sound, light, or water waves.

The distance between two consecutive peaks or troughs in a wave, commonly used in reference to light and sound waves.

A lipid substance that is water-repellent, found on plant leaves, and used by many animals for protective coating.

A plant considered undesirable, troublesome, or invasive, often growing where it is not wanted.

The force exerted by gravity on an object, often measured in newtons or pounds.

An area of land that is saturated with water, either permanently or seasonally, and supports aquatic plants and wildlife.