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Glossary of Bio chapter 1-2.6

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Controlled experiment
compares an experimental group with a control group
Levels of organization
Atom, Molecule, macromolecules, organells, Cell, Tissues, Organ, organ system, organism, species, population, commmunity, ecosystem, biosphere
Ecosystem
all biotic factors
Community
all organisms in an ecosystem
population
series in the same time + location that are interbreeding
Species
Organisms that can mate and produce fertile offspring
Organism
Living creature at least one cell big
tissues
a group of cells working together
Cell
smallest living unit
Organells
unit within a cell performing a given function
Macromolecules
protiens, fats, carbs
Molecues
2 or more atoms bonded
atom
smallest particle of matter retaining the characteristics of that element
properties of living organisms
Order, regulation, growth and development, Energy, Response to the environment, Reproduction, Evolution.
Matter
Matter is anything that has mass and volume. Matter, is in turn, composed of atoms
What four elements make up 96% of the elements found in the human body
Oxygen, Carbon, Hydrogen, Nitrogen
three subatomic particles
protons, electrons, nuetrons
protons
Located inside the nucleus and have a single positive charge.
electrons
Surrounds the nucleus and has a single negative charge.
Nuetrons
Located inside the nucleus and have no charge
atomic number
the number of protons that a particular element has.
mass number
equal to the number of protons plus the number of neutrons.
isotope
When the number of neutrons in an atom is changed
Compound
two or more different atoms combined to form a new substance
Elements
Atoms with unique characteristics
What happens to an atom with a full electron shell
atom is very stable

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