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8th grade Review2010

individual an single organism
population all of the same species of an organism living a certain area, like all the deer
community all of the different species of organisms living in a certain area
ecosystem all of the organisms and non-living objects in a certain area
biotic living
abiotic non-living
producer an organism that uses the sun to make its own food, it is at the bottom of an energy pyramid
primary consumer an organism that eats plants, a herbivore
secondary consumer an organism that eats other animals, a carnivore
decomposer an organism, like bacteria, that eats and breaks down dead organisms
photosynthesis the process of a plant making its own food; it take sin carbon dioxide and releases oxygen
homozygous when the genes are both dominant or recessive, like TT or tt
heterozygous when the genes are a mix of dominant or recessive, like Tt
phehotype the external characteristics of an organism that are produced by a combination of genes, like blue eyes or curly hair
genotype the genes that make up a characteristics, like Tt or tt
food web a diagram that shows the feeding relationships between all the organisms in an area
energy pyramid a diagram that shows how energy transfers between different organisms
density formula D= M/V
density the amount of matter or number of particles in an object
kinetic energy energy of motion
potential energy stored energy
mass market many copies of the same item produced for the general population
niche market a product made for a specific audience
physical change a change in form or appearance of an object but not its composition, such as ice melting
chemical change a change in an substance caused by a reaction; it creates a new substance
reactants the molecules/atoms that are mixed in a chemical reaction
product what is produced by a chemical reaction
compound atoms that are bonded together and can't be split
substance matter that has the same chemical composition throughout
mixture a combination of elements and compounds that has not formed a new substance; can be separated out
melting a change in the state of matter of an object, as from ice to water
newton's first law of motion an object at rest will stay at rest AND an object in motion will stay in motion UNLESS an outside force acts on it
newton's third law of motion for every action, there is an equal an opposite reaction
newton's second law of motion the greater the mass of an object, the greater the force needed to accelerate that object
law of conservation of mass mass is neither created nor destroyed; we can demonstrate this with a balanced equation
friction a forces that acts to slow down the movement of an object
gravity the force that pulls all objects towards the center of a planet
Created by: tbasci