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Science review
N/A
104
Science
9th Grade
12/16/2014

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Term
scientific method
Definition
organized set of investigations.
Term
hypothesis
Definition
a possible explanation for a problem using what u know or what u observed.
Term
experiment
Definition
test that effect of one thing or another using a controlled conditions.
Term
variable
Definition
is a factor that can cause a change in the results of a experiment.
Term
dependent variable
Definition
changes according to the change in others.
Term
independent variable
Definition
You can change to see how it affects the dependent variable.
Term
constant
Definition
does not change when other variables change.
Term
control
Definition
standard by which test results can be compound.
Term
bias
Definition
occurs when what the scientist changes how the result are viewed.
Term
model law
Definition
represents an idea,event or object to help people.
Term
theory
Definition
is an explanation of things or events based on knowledge gained from a observation.
Term
scientific law
Definition
is a statement about what happens in nature and is true at all times.
Term
technology
Definition
is the application of science to help people.
Term
precision
Definition
how closely measurements are to each other.
Term
accuracy
Definition
compares a measurement to the real or accepted value.
Term
volume
Definition
the amount of space taken by an object.
Term
mass
Definition
is the measurement of the quantity of matter in a object.
Term
density
Definition
is the mass per unit volume of a material.
Term
graph
Definition
visual display of information.
Term
agricultural biotechnology
Definition
is a collection of scientific techniques and genetic engineering.
Term
society
Definition
is a group of people that share similar values.
Term
engineer
Definition
bring technology together.
Term
constraints
Definition
design restriction factors ictions from out side factors.
Term
computer simulation
Definition
it use a computer to simulate stuff.
Term
prototype
Definition
full scale model of something.
Term
pilot plant
Definition
smaller version of something.
Term
control system
Definition
controls an object like a remote car.
Term
substance
Definition
type of matter with a fixed composition.
Term
element
Definition
if all the atoms in a substance have the same
identity.
Term
compound
Definition
ia a pure substance where atom have two or more elements.
Term
heterogeneous mixture
Definition
which different materials can be distinguished.
Term
homogenous mixture
Definition
contains two or more gases liquids solids.
Term
solution
Definition
is a homogenous mixture small and cannot be seen.
Term
colloid
Definition
are particles larger in a solution.
Term
tyndall effect
Definition
scattering of light by colloidal.
Term
kinetic theory
Definition
motion of particle in matter.
Term
kelvin
Definition
si unit for temp.
Term
temp
Definition
substance is a measure of average kinetic energy.
Term
thermal energy
Definition
kinetic and potential energies in all objects .
Term
heat
Definition
thermal energy the flows from something higher to something lower.
Term
specific heat
Definition
need to rise 1 kg with is 1 c.
Term
plasma
Definition
matter consisting of positively and negatively charged particles.
Term
heat of fusion
Definition
substance from a solid to a liquid.
Term
heat of vaporization
Definition
is the amount of energy required for 1 kg.
Term
atom
Definition
elements is a matter that is composed of one type.
Term
nucleus
Definition
center of atom.
Term
proton
Definition
particles with 1 plus charge.
Term
neutron
Definition
particles that dont have a charge.
Term
electron
Definition
particles with 1 neg charge.
Term
quark
Definition
protons neutron made up of smaller particle called.....
Term
electron cloud
Definition
area around the atom.
Term
atomic #
Definition
the # of proton = atomic #.
Term
mass #
Definition
the sum of proton and neutrons in the atom.
Term
isotope
Definition
atom of the same element with different #.
Term
avg atomic mass
Definition
weight avg of the isotope.
Term
periodic table
Definition
where the element are arranged.
Term
group
Definition
the vertical columns on the periodic table.
Term
electron dot diagram
Definition
use the symbols of the elements and dots to show a graph.
Term
period
Definition
the horizontal row on the periodic table
Term
chemical formula
Definition
tells what elements are compound.
Term
ion
Definition
is a charged particle because it now has more or fewer.
Term
chemical bond
Definition
is the force that hold atoms together.
Term
ionic bond
Definition
attraction between opposite charges
Term
covalent bond
Definition
forms between atoms when they are shared.
Term
molecule
Definition
neutral particles that form as a result of electron sharing
Term
polar molecule
Definition
slightly pos and a slightly neg
Term
nonpolar molecule
Definition
is one which electrons are shared equally
Term
binary compound
Definition
one that is composed of two elements.
Term
oxidation #
Definition
the charge on the ion.
Term
polyatomic ion
Definition
ia pos or neg charge.
Term
hydrate
Definition
his a compound that has water.
Term
chemical reaction
Definition
change in which one or more substances change.
Term
reactant
Definition
a substance that reacts.
Term
product
Definition
new substance produced.
Term
chemical equation
Definition
is a way to describe a chemical equation.
Term
balancing chemical equations
Definition
is where u balance the equations.
Term
combustion reaction
Definition
occurs when a substance reacts with oxygen
Term
synthesise reaction
Definition
two or more substance combined.
Term
decomposition reaction
Definition
occurs when one substance breaks own
Term
single displacement reaction
Definition
described by a + bc arrow ac + b
Term
double displacement reaction
Definition
the pos ion in one compound replaces another.
Term
activation energy
Definition
the minimum amount to start a reaction
Term
endothermic reaction
Definition
when energy forms heat.
Term
exothermic reaction
Definition
when the energy given off reactions.
Term
rate of reaction
Definition
is the speed a reaction occurs.
Term
catalyst
Definition
speed up a reaction.
Term
inhibitor
Definition
it slow down chemical reaction.
Term
solution
Definition
mixture that has the same compositions.
Term
solute
Definition
substance that is being dissolved.
Term
solvent
Definition
the substance doing the dissolving.
Term
aqueous solution
Definition
solution where water is the solvent.
Term
solubility
Definition
how soluble salt is in water
Term
concentration
Definition
how much solute is present.
Term
saturation solution
Definition
contans all the solute it can hold
Term
unsaturated solution
Definition
solution that can dissolve more solute
Term
supersaturated solution
Definition
contains more solute the a saturated.
Term
acid
Definition
produces hydrogen ions in water solutions
Term
indication
Definition
i an organic compound.
Term
base
Definition
any substance that forms hydroxide ions.
Term
strong acid
Definition
dissolves in water
Term
weak acid
Definition
dissolves in water small percents
Term
strong base
Definition
dissociates completely in solution
Term
weak base
Definition
does not dissociate
Term
ph
Definition
of a solution is measure in
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