Transcript Chapter 2 Earth Science

Chapter 2
Earth Science
Matter
Words to Know – Section 1
Atoms
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matter
atom
element
proton
neutron
electron
atomic number
mass number
isotope
anything that has mass and
takes up space
• matter
tiny building blocks of matter,
made up of protons, neutrons,
and electrons
• atom
substance that is made of only
one type of atom
• element
particle that has a positive
electric charge
• proton
particle without an electric
charge
• neutron
particle with a negative charge
• electron
the number of protons in an
atom
• atomic number
the number of protons plus the
number of neutrons in an atom
• mass number
atoms of the same element that
have different numbers of
neutrons
• isotope
Words to Know – Section 2
Combinations of Atoms
• compound
• molecule
• ion
• mixture
• heterogeneous mixture
• homogeneous mixture
• solution
atoms of more than one type of
element that are chemically
bonded together
• compound
a group of atoms connected by
covalent bonds
• molecule
electronically-charged atom
whose charge results from an
atom losing or gaining electrons
• ion
composed of two or more
substances that are not
chemically combined
• mixture
a mixture which is not mixed
evenly and each component
retains its own properties
• heterogeneous mixture
a mixture which is evenly mixed
throughout
• homogeneous mixture
a mixture which is evenly mixed
throughout; also known as a
homogeneous mixture
• solution
Words to Know – Section 3
Properties of Matter
• density
measurement of the mass of an
object divided by its volume
• density