General Science & Ability

The brainstem

The cerebellum

Capable of being broken down naturally by microorganisms and other biological processes

Calcium carbonate skeletons produced mainly by reef-building corals

Animals

Because dissolved minerals and salts are supplied mainly by weathering of rocks and other geologic processes and accumulate in seawater

The warm phase of a recurring climate pattern in the tropical Pacific Ocean that can affect weather worldwide

A powerful stellar explosion associated with the death or disruption of certain stars

A cloud of gas and dust in interstellar space

Distance

A planet that orbits a star outside our Solar System

Earth's magnetosphere