What Is the Troposphere?

The troposphere is the lowest layer of the atmosphere. It starts at ground level and extends upwards to about 13 km. All weather occurs in the troposphere.

What Color Is the Moon

What Color Is the Moon?

What Color Is the Moon? Published on: | Last Updated: If you look up close to the moon’s surface, what color is the moon? Well,

Mars Atmosphere Composition

Mars Atmosphere Compared to Earth

Carbon dioxide dominates Mars atmosphere. But Earth is rich in nitrogen and oxygen. Mars has a much thinner atmosphere. In fact, Earth is 100x denser.

How Big Is the Moon

How Big Is the Moon?

How big is the moon? It’s about 1/4 (27%) the size in diameter of Earth. Alternatively, you can think of the moon being about as wide as the United States.

Facts About Volcanoes

10 Little-Known Facts About Volcanoes

Ready to learn about volcanoes? From lightning that sparks at a volcano to its deadly hazards, we’re going to dive into 10 little-known facts about volcanoes


Lahar: Flowing Mud at Volcanoes

“Lahar” is an Indonesian word for mudflow at volcanoes. Lahar flows down volcanoes as a mix of mostly water, mud and rock debris (similar to wet concrete).

shield volcano

What is a Shield Volcano?

The name “shield volcano” originated from its Roman shield-like shape. They are broad, flat and can stretch hundreds of miles wide like Mauna Loa in Hawaii.