Eruptions cause widespread destruction and death but are vital for our survival.
Powerful quakes strike near the Earth's plate boundaries.
Oceans cover about 71% of the Earth's surface.
The atmosphere protects our planet from radiation and asteroids.
The greenhouse effect saves Earth from an icy fate
Carbon is a key ingredient of all known life.
The Antarctic ice sheet holds about 90% of the fresh water on the planet's surface.
Glaciers scour the land surface and erode solid rock.
Earthquakes and volcanoes are common at plate boundaries.
Most mountains are formed at tectonic plate boundaries.
Billions of years from now it is predicted the Sun will destroy the Earth.
Asteroids and comets peppered the Earth.