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33 Cards in this Set

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Characteristics of Living Things
reproduction, growth and development, homeostasis, organization
increase in the amount of living material in an organism
growth
series of changes an organism, undergoes in reaching its final, adult form.
development
steady state of the internal operation of an organism regardless of external changes
homeostasis
all variables are the same except the 1 being tested
conrolled experiment
the group in which all the variables remain constant, including the independent variable
control group
the group in which the independent variable change
experimental group
variable being tested
independent variable
any change that results from the manipulation of the independent variable
dependent variable
statement formed by analyzing observations and sorting through possible causes of the effect noted
hypothesis
scientific test of a hypothesis used to determine whether or not the hypothesis is correct
experiment
microscope used to view small structures
transmission electron microscope (TEM)
electron microscope that permits a view of surfaces not possible with the TEM
scanning electron microscope
positively charged
Protons
no charge
Neutrons
Electrons
negative charged
-the region or space that electrons occupy while moving around the nucleus
Electron cloud
-substance composed of 1 type of atom
Elements
- join the combinations of atoms
Covalent bonds
- a combination of 2 or more atoms joined by a covalent bond
Molecule
charged atoms
ions
force of attraction between 2 ions
ionic bond
mixtures that are the same throughout but have variable compositions, depending on how much of one substsance is dissolved in the other
solutions
molecules that have oppositely charged regions
polar molecules
solution have greater concentration of hydrogen ions then hydroxide ions
acid
greater concentration of hydroxide ions than hydrogen ions
base
organic molecules having the same chemical formula but different structural formula
isomers
organic compounds composed of carbon, hydrogen, and oxygen with a ratio of 2 hydrogen atoms to each oxygen atom

ex: starches, glucose
carbohydrate
monosaccaride
glucose, fructose (fruit), galactose (milk)
sucrose, lactose, and maltose
disaccarides-isomers
C12 H22 O11
polysaccarides
starch, cellulose, glycogen
composed of carbon, hydrogen, and oyygen, but the no. of hydrogen atoms per molecule is much greater than the no. of oxygen atoms
lipids
ex of lipids
cholesterol, fat molecules