The respiratory system manages respiration which is the process by which blood cells absorb oxygen and eliminate carbon dioxide.

An element is matter than cannot be separated into different types of matter by ordinary chemical methods.

Work is performed on an object when an applied force causes displacement along the same vector. Measured in joules (J) or newton-meters (Nm), work is calculated by multiplying force times displacement:  \(W = \vec{F}\vec{d}\)

Clouds are categorized based on their shape, size, and altitude. Stratus clouds are low-altitude clouds characterized by horizontal layering with a broad flat base. When stratus clouds occur on the ground the result is fog.

The Fahrenheit scale is used for measuring temperature in the British system. The metric system uses the Celsius scale.