科学

The body of terms used with a particular technical application in a subject of study, theory, profession, or etc.

The relationship between an event (the cause) and a second event (the effect), where the second event is understood as a physical consequence of the first.

A biological community of interacting organisms and their physical environment. It encompasses the complex relationships between living things and non-living resources.

Lacking in movement, action, or change; in physics, relating to bodies at rest or forces in equilibrium.

An element, feature, or factor that is liable to vary or change; a variable in a scientific or mathematical context.

The magnitude or intensity that must be exceeded for a certain reaction, phenomenon, result, or condition to occur. Often used in biology, psychology, and engineering.

Very rare or seldom seen; unusual. It often describes natural phenomena, rare diseases, or historical events that happen once in a long time.

To move or swing back and forth at a regular speed; regular fluctuation of a value or quantity above and below a mean value.

The act of one animal preying on others for food. This is essential vocabulary for TOEFL lectures describing predator-prey relationships.

The state or process of a species, family, or larger group being or becoming extinct. A core concept in TOEFL passages about dinosaurs or environmental conservation.