Exploring Earth Science Concepts

Front

*Front:* Continental Drift

Back

that continents move over Earth's surface

Front

*Front:* Alfred Wegener

Back

the theory of continental drift

Front

*Front:* Pangaea

Back

that existed 300 million years ago

Front

*Front:* Sea Floor Spreading

Back

of new oceanic crust forming at mid-ocean ridges

Front

*Front:* Mid-Ocean Ridge

Back

mountain range formed by plate tectonics

Front

*Front:* Atoms

Back

unit of matter

Front

*Front:* Protons

Back

charged particles in an atom's nucleus

Front

*Front:* Neutrons

Back

particles in an atom's nucleus

Front

*Front:* Electrons

Back

charged particles orbiting an atom's nucleus

Front

*Front:* Atomic Number

Back

of protons in an atom