Earth's Spheres
This sphere is Earth's largest in terms of mass and volume.
What is the geosphere?
This is the estimated age of Earth.
What is 4.6 billion years?
Carbon is transferred from the biosphere to the geosphere through the conversion of dead organic matter to this
What is fossil fuels?
This is the gaseous layer above Earth's surface.
What is the atmosphere?
This is the percentage of water on earth that is liquid fresh water.
What is 0.64%
An example of this is: on Monday it rains 5 cm, but there is no flooding. Most of the water soaks into the soil. Then it rains only 2 cm Tuesday but there is flooding because the ground has reached its saturation point.
What is the Threshold Effect?
These are greenhouse gases.
What are carbon dioxide and methane?
This is the mostly solid, rocky material making up the surface of the Earth, all the way through to the core.
What is the geosphere?
This is the percentage of Earth's history that humans have existed.
What is one tenth of one percent?
An example of this is a tectonic plate moves a few centimeters per year. Over millions of years, this adds up to a large distance.
What is gradualism?
This is the most abundant element in the Earth's atmosphere.
What is nitrogen?
This is where all living things below, on, and above the surface of Earth exist.
What is the biosphere?
This is where water in solid, liquid, and gaseous forms exist.
What is the hydrosphere?