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Semester Exam Review pg 3

Water Cycle model describing how water moves from the Earth's surface to atmosphere and back to the surface again through evaporation, condensation, precipitation
Evaporation water changes from a liquid to a gas
Condensation gas changes back to a liquid
Precipitation droplets that fall from the clouds to ground as rain, snow, sleet, etc...
Nitrogen cycle model describing how nitrogen moves from the atmosphere to the soil, to living organism, and then back to the atmosphere.
Nitrogen cannot be used by plants in the free form in the air. Some soil bacteria can form the ________ so that plants can use it. Animals eat plants for _________. Waste from animals returns ________ to the soil.
nitrogen When animals and plants die and decompose ______ is returned to the soil for plants. Plants use the _______ to build cells. Human body uses _______ for DNA.
Carbon Cycle describes how carbon molecules move between the living and nonliving world.
Carbon Cycle The ______ _________ begins when producers (plants) remove carbon during photosynthesis. The plants release oxygen. All other organisms use the oxygen and release carbon back into the air. This is part of respiration.
Human activities release carbon into the atmosphere. (Fossil fuels for gasoline, burning coal, and burning materials)
carbon We have cut down so many trees that is is hard for all _______ to be recycled as oxygen.
human population The ______ __________ is increasing which requires more natural resources to be used. The more people, the more fossil fuels we use which increases pollution.
pollution The more people, the more fossil fuels we use which increases _____________. This will cause more of the greenhouse gases and the result is global warming.
renewable resources that can be replaced
nonrenewable resources that cannot be replaced
Fossil fuels and Nuclear Energy are both nonrenewable
Water, solar, hydroelectric, and geothermal all all resources that are renewable
Created by: mgrant