In flesh and blood, 7.6 billion humans live on Earth. The emergence of humans has left a profound impact. The demand for resources is the human footprint.
Climate feedback loops either amplify or reduce climate change. Positive feedback loops like permafrost melt amplifies climate change because it releases methane.
Lightning is hotter than the sun, it strikes 8.6 million times a day and more lightning facts. Because when there’s thunder, there’s sure to be lightning.
The Earth is a big magnet. This is why compasses point to the magnetic north. But north didn’t always point northward because of magnetic pole reversals.
Main highlights of the stratosphere are: (1) The ozone layer absorbs harmful UV light (2) This causes temperature to rise (3) It contains 10% of air mass.
The Coriolis effect is the deflection of air due to Earth’s rotation. Air veers to the right in the northern hemisphere. And vice versa south of the equator.
The exosphere is the upper part of Earth’s atmosphere. It starts at about 500 km and gradually extends into the vacuum of outer space at about 190,000 km.
From largest to smallest, Earth’s atmosphere composition contains nitrogen, oxygen, argon, CO2 and trace gases. Water vapor is excluded from this total.
There are 4 primary layers of the atmosphere on Earth: troposphere, stratosphere, mesosphere and thermosphere. The ionosphere and exosphere are above those.
Highlights of the mesosphere include: (1) Air is very thin (2) It’s the coldest region of the atmosphere close to -100°C and (3) It’s where meteors burn up.