Geophysics
All contributors in Geophysics
What Causes Northern and Southern Lights
The Aurora, often called the northern or southern lights, are caused by interactions between Earth's upper atmosphere and charged particles from the Sun. more...
Earth's Interior Structure and Composition
Earth's interior structure includes the crust, mantle, inner core, and outer core. The crust and mantle are rocky. The inner and outer cores are metallic. more...
Tectonic and Geologic Activity on Venus
With 80% of its surface covered with volcanoes or solidified lava flows, Venus is very tectonically active, but tectonics on Venus differ from plate tectonics on Earth. more...
Volcanoes and Geology of Venus
Venus has over 1600 large volcanoes and many more smaller ones. Comparing the types of volcanoes found on Venus to Earth's volcanoes helps scientists understand both. more...
Why Earth has Fewer Craters than Moon
The Moon's surface is littered with meteorite impact craters, but Earth has very few because geologic and plate tectonic activity destroyed ancient impact craters. more...
Plate Tectonics and Geology in the Solar System
Earth has very active plate tectonics shaping its geology and features. Other planets and moons in the solar system have varying degrees of tectonic activity. more...
Plate Tectonics and Geologic Features on Mars
Mars has some of the largest known geologic features in the solar system because Martian tectonic and geologic processes are different than plate tectonics on Earth. more...
All feature articles in Geophysics
The direction of north and south we take for granted, but magnetic north and south have switched places in the past and may do so again in the near future. more...
All contributing articles in Geophysics