Month: July 2017

Earth’s Atmosphere Composition: Nitrogen, Oxygen, Argon and CO2

From largest to smallest, Earth’s atmosphere composition contains nitrogen, oxygen, argon, CO2 and trace gases. Water vapor is excluded from this total.

What Are the 4 Layers of the Atmosphere? [Infographic]

There are 4 primary layers of the atmosphere on Earth: troposphere, stratosphere, mesosphere and thermosphere. The ionosphere and exosphere are above those.

What Are the 8 Major Phases of the Moon?

At all times the sun illuminates half of the moon. Depending on your point of view, this is what causes the various phases of the moon.

How Far Is the Moon?

The moon is approximately 238,855 miles (384,400 km) away from the Earth. It’s such a big gap that you can almost fit all the 7 other planets in between.

What is Earth’s Geological Time Scale?

Earth’s geological time scale is almost unimaginable to us. This is because humans lifespans are so short in comparison (in hours, days, months and years).

Earth Rotation: The Day-Night Boundary

As the Earth spins, the sun always shines on one side which gives it sunlight. When you’re facing the sun, it’s daytime. But when you’re not, it’s night.