THE NITROGEN CYCLE
Nitrogen (N) is an element like carbon. All creatures need nitrogen to survive.
There are huge amounts of nitrogen gas in the atmosphere, but most animals
and plants have no way of using it. It needs to be fixed (put into a biologically
YES. IRON CYCLES TOO.
Iron (Fe) atoms also cycle through the ecosystems of the world. Although
there is cross-over, there is a difference between the cycling on land and in
the water. The differences are based on how the producers get their iron in the
While groundwater is the clean, beautiful water under our feet that can be
tapped for drinking water, there are many other sources of fresh water across
the planet. The others are not as filtered and clean. Bodies of water such as
Energy does not cycle the way nutrients and atoms do. Energy enters the
ecosystem from the Sun and exits after the organisms have taken as much as
they need. Organisms release energy back into the biosphere as heat.
Energy also enters the e
Water water everywhere and always moving around. Even the smallest water
molecule at the bottom of the ocean is moving. It just moves really slowly.
We're going to talk about the hydrologic cycle. This is the path water takes
when it moves t
There are both global and local circulations of the air around us. Scientists
have different terms for the circulation based on how large the air movements
are. They say macroscale to describe wind currents that are on a global
MAKIN' THE SOIL
The process of soil formation happens in many ways. Here are five of the
most important factors involved in soil formation. There are others, but these
are the biggies.
(1) It can be created because of the shape of the landscape. That shap
THE CARBON CYCLE
Carbon (C) is the basis of life on Earth. Scientists consider 99.9% of all
organisms on the planet to be carbon based life. Those organisms need
carbon to survive. Whether the carbon is in the form of a sugar or carbon
dioxide gas, we all
Phosphorus (P) is another one of the essential elements that cycle through
the ecosystem. It is an element that is found in the ground and then taken up
by plants and animals. Phosphorus starts its existence as phosphate ions
(PO4) in t
Oxygen (O) atoms cycle through the ecosystem and the biosphere the way
other elements do (especially carbon). The Earth has a fixed supply of the
element even though it can be found everywhere, including the atmosphere,
the oceans, rocks, a