A meteorite is a meteor that has fallen to Earth. Meteorites are either stone, iron, or stony-iron. Meteoroid Meteoroids are tiny stones or pieces of metal that travel through space. Migration A migration is a seasonal journey from one region to another. Many whales migrate yearly from cold feeding waters to warm breeding waters.
Gray whales make the longest cetacean migration.
A million is a thousand thousand. The dinosaurs lived millions of years ago. Mineral A mineral is a naturally-occurring solid of definite chemical composition whose atoms usually form a regular pattern. They have a huge head - up to one quarter of the length of the body. Many have a calcerous shell around the body.