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science finall vocab

Terms

undefined, object
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Buoyant force
the upward force exerted by a gas or liquid that keeps an object afloat
atom
the smallest part of an element that has all the properties of that element.
atomic mass
the mass of neutrons and protons in an atom
acid
a compound that tastes sour, reacts with metals, turns blue litmus paper red, and increases the hydronuim ions in water.
base
a compound that tastes bitter, feels slippery turns red litmus paper blue, increases hydroxide ions in water.
control
the part of the experiment that reamains unchanged
compound
a substance composed of 2 or more elements in a definite ratio.
catalyst
a reactant that speeds up a reaction
endothermic reaction
a reaction in which energy is added.
covalent bond
a bond formed between two nonmetals sharing electrons.
diatomic molecule
a molecule consisting of two of the same kind of atoms
ductile
the property of a metal that allows it to be pulled into wires.
electron
the subatomic particle of an atom having a negative charge
element
a pure substance that cannot be seperated into simpler substances by a chemical means
Dmitri mendeleev
first person to come up with a working periodic table.
exothermic reaction
a reaction in which energy is given off.
density
the ratio of a substances mass to its volume.
condensation
the change from a gas to a liquid.
force
a push or pull
gram
SI unit of weight.
gravity
a property of matter; the force of attraction between all objects.
indicator
a substance that changes color in the presents of an acid or a base.
intertia
the tendency of an object to resist a change in motion
inhibitor
a reactant that slows down a reaction
ionic bond
a bond formed between a metal and a nonmetal, electrons are transfered from the metal to the nonmetal
issac newton
scientist who discovered relationship between objects in motion, at rest, and accelerating; and the effect of gravity on an object
law of conservation of mass
matter can not be created or destroyed in ordinary chemical reactions
liter
SI unit of volume
mass
the amount of matter in an object
malleable
the property of a metal that allows it to be shaped
matter
anything that has mass and takes up space
metal
a shiny substance that conducts heat and electricity
metalloid
elements that have properties of metals and nonmetals
meter
SI unit of length
molecule
the smallest part of a compound having all of the properties of that compoud
neutron
the subatomic particle of an atom having no charge, found inside the nucleus
nonmetal
a substance that conducts heat and electricity poorly
PH
a scale that expresses the acidity or basicity of a substance
pecipitate
an insoluble substance formed in a chemical reaction
proton
the particle of an atom having a positice charge, found in the nucleus
soulubility
the ability of one substance to dissolve into another.
solute
the substance being dissolved
solution
a mix in which one substance is dissolved into another
solvent
the substance in which the solute is dissolved
sublimation
changing directly from a soild to a gas without becoming a liquid
viscosity
the resistance of a gas or liquid to flow
volume
the amount of substance in an object
weight
the measure of gravity on an object
isotope
atom that has the normal atomic number (protons) but a different mass number
cunduction
transfer of heat from 1 body to another without movement
convection
transfer of heat from 1 body to another with movement

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