Energy Roles
An organism that obtains energy by feeding on other organisms is a
What is a consumer
A carnivore that feeds on the bodies of dead organisms is a
What is a Scavenger
The advance of desert-like conditions in an area once fertile
What is desertification
The process when oxygen goes into the atmosphere
What is the oxygen cycle
The average annual temperature and amount of precipitation
What is climate
An organism that can make its own food is a
What is a producer
Things that break down biotic wastes and dead organisms and return the raw materials to the ecosystem is a
What is a decomposer
The process by which molecules of liquid water absorb energy and change to a gas
What is evaporation
Human activities also affect the levels of carbon and oxygen in the atmosphere
What is human impact
Forests in which are large amount of rain fall year around
What are rain forests
Consumers that eat only plants are a
What are herbivores
A series of events in which one organism eats another and obtains energy is a
What is a food chain
The process by which a gas changes in to a liquid
What is condensation
The process of changing free nitrogen into usable form of nitrogen
What is nitrogen fixation
The tallest layer of the rain forest which receives the most sunlight
What is a emergent layer
Consumers that eat only animals are
What is a carnivores
Consists of many overlapping food chains in an ecosystem is a
What is a food web
Rain, snow, sleet, or hail is a form of
What is precipitation
An area that receives less than 25 cm. of rain per year
What is a desert
Trees up to 50 meters tall form a leafy roof
What is canopy
Consumers that eat both plants and animals are
What are omnivores
A diagram that shows the amount of energy that moves from one feeding level to another in a food web
What is a energy pyramid
The process when carbon dioxide goes into the atmosphere
What is the carbon cycle
A group of ecosystems with similar climates and organisms
What is a biome
Around 15 meters high from the bottom of the rain forest trees
What is understory