Acceleration is the rate of change of velocity per unit of time. In physics, the delta symbol (\(\Delta\)) represents change so the formula for acceleration becomes \(\vec{a} = { \Delta \vec{v} \over t }\)

A biome is a large naturally occurring community of flora (plants) and fauna (animals) occupying a major habitat (home or environment).

The nucleus of a eukaryotic cell contains the genetic material of the cell and is surrounded by cytoplasm which contains many organelles. These include:

An exoskeleton (external skeleton) is common in arthropods like insects, spiders, and crustaceans.

Radiation occurs when electromagnetic waves transmit heat. An example is the heat from the Sun as it travels to Earth.