1. WAYS HUMANS ALTER THE CARBON CYCLE
Big picture: The transformation & movement of carbon between the atmosphere, _________ and __________ ____________, and ___________________.
Details:
1) Plants use energy from the sun to convert CO2 into __________ through photosynthesis.
2) It is _______________ to animals which eat the plants.
3) Carbon is released into the atmosphere by _________________, _________________, & burning fossil fuels.
Forests also “_________” carbon.
WAYS HUMANS ALTER THE CARBON CYCLE
______________________: removing trees that release carbon dioxide from the atmosphere. Fewer trees mean less carbon dioxide is being absorbed.
________________________ in industry & vehicles: Carbon is a by-product of combustion. The amount of carbon dioxide in the atmosphere has been rising. Some say it is contributing to _________ _____________.

2. WATER CYCLE (Hydrologic)
NITROGEN CYCLE
Big picture: Large amounts of nitrogen are found in the atmosphere and is _________ for living organisms (nucleotides & amino acids).
Details:
1) ______________ bacteria convert Nitrogen (N2) gas from the atmosphere to a form plants can use.
2) Animals get nitrogen by eating plants or other animals.
3) When the organism & it’s wastes ___________, the nitrogen is released into the soil.
4) ___________ bacteria release it to the atmosphere.
WATER CYCLE (Hydrologic)
Big picture: Water moves between the _______________(oceans & lakes), the _________ (water vapor & clouds) & the _______________ (ground).
Details:
1) The sun drives the water cycle & causes ____________of surface water & transpiration from plants.
2) The water vapor _____________ forming clouds & _________________.
3) The water falls as precipitation, where it either sinks into the ground OR it enters lakes/rivers as ________________.

3. WAYS HUMANS ALTER THE NITROGEN CYCLE THE CYCLING OF MATTER
The rate of nitrogen fixation has increased since the 1950s.
___________: contain nitrogen.
_________________: releases nitrogen.
__________________& ____________: release nitrogen.
THE CYCLING OF MATTER
BIOGEOCHEMICAL CYCLES: the movement of _________________through ____logical & _____logical (living & nonliving) parts of an ecosystem.
*Earth is a closed system. Nothing enters or leaves.

4. The Cycles of Earth
Carbon Cycle
Nitrogen Cycle
Water Cycle