2.1
the process of changing free nitrogen into a usable form of nitrogen
Nitrogen Fixation
an organism that obtains energy by feeding on other organisms
Consumer
energy moves through an ecosystem when
one organism eats another
the tallest layer of the rainforest which receives the most sunlight and courage up to 70 m high
The Emergent Layer
organisms that breakdown biotic waste and dead organisms and return the Raw materials to the ecosystem
Decomposers
in the nitrogen cycle, nitrogen moves from the air into the soil, into living things, and
Back into the air or soil
a carnivore that feeds on the dead bodies of dead organisms
Scavenger
a series of events in which one organism eats another and obtains energy
Food Chain
the middle layer of the rain forest that goes up to 50 m tall forming a leafy roof
The Canopy
an area of a grassland located close to the equator that receives as much is 120 cm of rain each year and has scattered shrubs and small trees
Savanna
in ecosystems, the processes by which carbon and oxygen are recycled, are linked. __________________, __________________, and ______________________ all play roles in recycling carbon and oxygen
Producers, consumers, decomposers
consists of many overlapping food chains in an ecosystem
Food web
a diagram that shows the amount of energy that moves from one feeding level to another in a food web
Energy Pyramid
the lowest layer below the canopy. a layer of short trees and vines around 15 meters high above the ground
Understory
a biome of dense forests of evergreens with very cold winters and short mild summers. Spruce and Fir trees
Boreal Forest
The processes of __________________, ____________________, ______________________ make up the water cycle
Evaporation, condensation, precipitation
extremely cold and dry biome; known for its permafrost, mosses, lichens are the primary plants
Tundra Biome
the most energy is available at the _________________ level of the energy pyramid.
Producer
the six major biomes are
desert, rainforest, grassland, deciduous forest, boreal forest, and tundra
Ground that is permanently frozen found in the Tundra Biome
Permafrost
two or more atoms that are joined an act as a unit make up a
Molecule
Matter is made up of tiny particles called
Atoms
an area that is populated mostly by grasses another non woody plants and receives 25 to 75 cm of rain each year
Grassland
it is mostly the ________________, the average ________________________________ and __________________________________________, in an area that determines its biome
climate, annual temperature, amount of precipitation
Some land areas like mountains which have a variety of habitates and climates are not classified as ____________
Biomes