5 results for “air”

1. Planet Earth

   The Atmosphere

   air is Dry air is about 78 percent nitrogen, 21 percent oxygen and just under one percent

   Article · 4 min read

   

2. Planet Earth

   Weather and Climate

   air is lighter than cold air, so at the equator heated air rises, spreads toward the poles

   Article · 4 min read

   

3. Planet Earth

   Volcanoes

   air breathable and can bury cities in hours. In August of the year 79, the people

   Article · 4 min read

   

4. Planet Earth

   Rocks, Minerals and Fossils

   air, when ice ages came and went, where continents stood and how life responded. They hold

   Article · 4 min read

   

5. Planet Earth

   Inside the Earth

   air and sea, keeping the climate habitable over geological time. The core's magnetic field protects

   Article · 4 min read