Cycles
help to break down the dead matter and return the nutrients.
decomposers
shape of the Earth.
sphere
the place within an ecosystem where an organism lives.
habitat
animals with a backbone.
vertebrate
The ability to burn.
flammability
a substance that organisms need to grow, develop, and reproduce.
nutrient
The center of the Earth.
core
coldest of all the land biomes. It is also one of the driest biomes
tundras
aquatic which means they are adapted to living in water. Have gills
fish
stored energy.
potential energy
where nutrients are stored; such as clouds, oceans, and lakes.
reservoirs
topographic(land) features formed by processes that shape Earth’s surface.
landforms
the demand for resources, such as food,water, and shelter.
competition
spend part of their life in water; but also part of their life on land.
amphibians
a negatively charged atom.
electrons
Humans remove petroleum from the Earth and burn it to release energy.
combustion
the force that every object exerts on all other objects because of their masses.
gravity
a symbiotic relationship that benefits only one species and harms the other.
parasitism
This group includes starfish, sea urchins, and sand dollars.
echinoderms
These elements have some properties of metals and some properties of nonmetals.
metalloids
important nutrient because it is the element on which all living things are based. It can also be found in rocks and minerals.
carbon
the layer of gasses that surround Earth.
atmosphere
all the organisms of the same species that live in the same area at the same time.
population
mammals that have babies that crawl inside the pouch of their mother
marsupials
the opposition to the current’s flow.
resistance