Fill in the Blanks
Helpful study tool for 8th grade science exam.
energy
naturally
flows
from
warmer
to
cooler
matter
,
this
is
what
we
know
as
heat
or
heat
flow
.
has
mass
and
volume
(
takes
up
)
.
is
the
study
of
matter
and
the
changes
in
matter
.
A
balloon
filled
with
air
does
not
rise
as
high
as
a
balloon
filled
with
helium
gas
,
telling
me
that
helium
gas
is
dense
than
air
.
A
mixture
of
iron
and
sulfur
can
be
separated
by
a
.
A
special
form
of
homogeneous
mixture
that
is
composed
of
evenly
distributed
solute
particles
in
a
solvent
is
called
a
(
n
)
.
A
substance
is
a
single
kind
of
matter
that
has
a
specific
.
A
(
n
)
change
(
reaction
)
releases
energy
so
the
environment
gets
warmer
,
while
a
(
n
)
change
(
reaction
)
absorbs
energy
so
the
environment
gets
cooler
.
A
(
n
)
is
the
smallest
part
of
a
substance
.
A
(
n
)
is
the
smallest
unit
of
matter
that
has
the
properties
of
its
element
.
An
object
that
floats
on
water
has
a
density
than
1
-
g
/
mL
.
An
object
that
sinks
in
water
has
a
density
than
1
-
g
/
mL
.
An
object
?
s
weight
is
1
/
6
on
the
moon
as
it
is
on
earth
.
On
the
moon
,
the
object
?
s
mass
.
Another
term
for
the
ability
to
burn
is
at
temperatures
below
37
.
8
?
.
Both
a
pool
of
water
and
a
piece
of
ice
are
the
same
,
so
they
have
the
same
.
Butter
melting
in
a
pan
is
a
change
where
energy
is
.
Characteristics
of
matter
are
called
.
Compounds
are
formed
as
a
result
of
during
chemical
reactions
in
a
set
ratio
.
Four
measurable
physical
properties
of
matter
are
,
,
,
and
.
Of
these
,
and
are
derived
measurements
and
must
be
calculated
.
Glass
breaking
,
ice
melting
,
and
the
dissolution
of
sugar
in
water
are
all
properties
.
H2SO4
and
H2SO3
the
same
substance
.
Iron
rusting
,
silver
tarnishing
,
fruit
ripening
,
and
combustion
are
all
properties
.
New
substances
are
produced
by
a
(
n
)
change
,
while
a
(
n
)
change
does
not
result
in
a
new
substance
.
One
liter
is
equal
to
milliliters
.
One
milliliter
is
equal
to
cubic
centimeters
.
Salad
dressing
is
an
example
of
a
mixture
.
Salt
water
is
an
example
of
a
mixture
.
Solid
,
liquid
,
gas
,
plasma
,
quantum
foam
are
the
five
(
states
)
of
matter
.
Substances
in
a
keep
their
own
properties
since
they
are
not
combined
.
The
of
an
object
is
a
measure
of
the
(
motion
of
the
particles
)
of
a
substance
.
The
ability
of
iron
to
rust
is
a
(
n
)
property
.
The
amount
of
matter
in
an
object
is
a
measure
of
its
.
The
amount
of
space
an
object
takes
up
is
a
measure
of
its
.
The
chemical
symbol
for
tungsten
is
,
where
Au
stands
for
.
The
chemical
formula
for
is
H2O
and
for
is
H2O2
.
The
energy
stored
in
bonds
between
atoms
is
energy
,
a
form
of
potential
energy
.
The
form
or
appearance
of
a
substance
is
altered
during
a
(
n
)
change
,
where
the
actual
chemical
composition
or
ratio
of
atoms
is
altered
during
a
(
n
)
change
.
The
Law
of
Conservation
of
Mass
states
that
in
any
physical
or
change
,
matter
is
neither
created
or
destroyed
,
only
changed
from
one
form
to
another
.
The
mass
of
an
object
is
,
whereas
the
weight
of
the
same
object
depending
on
its
location
.
The
mass
per
unit
volume
of
an
object
is
a
measure
of
its
.
The
metal
tungsten
is
used
in
incandescent
light
bulbs
because
of
its
property
of
conductivity
.
The
physical
property
that
makes
metal
pots
good
for
cooking
is
.
The
ratio
of
each
type
of
atom
in
sulfuric
acid
,
H2SO4
,
is
hydrogen
to
sulfur
to
oxyge
n
The
SI
unit
for
density
is
/
,
but
the
common
unit
is
/
.
The
SI
unit
for
mass
is
,
but
the
common
unit
is
.
The
SI
unit
for
volume
is
,
but
the
common
unit
is
.
The
SI
unit
for
weight
is
.
The
simplest
type
of
substance
is
a
(
n
)
,
which
is
made
up
of
atoms
,
molecules
,
or
compounds
.
The
substances
in
a
mixture
are
evenly
distributed
and
you
cannot
see
the
parts
.
The
substances
in
a
mixture
can
usually
be
seen
and
are
easily
separated
.
When
the
atoms
in
elements
combine
to
form
compounds
,
their
change
.
Air
,
gasoline
,
wood
,
and
water
would
float
on
water
because
their
densities
are
than
that
of
water
.
Aluminum
,
steel
,
silver
,
lead
,
mercury
,
and
gold
would
sink
in
water
because
their
densities
are
than
that
of
water
.
the
top
line
represents
a
exothermic
reaction
since
the
environment
is
.
he
bottom
line
represents
an
endothermic
reaction
since
the
environment
is
.
The
amount
of
space
that
matter
fills
is
its
.
A
state
of
matter
with
a
definite
volume
,
but
no
definite
shape
is
a
(
n
)
.
A
(
n
)
will
always
take
the
shape
and
volume
of
its
container
.
The
is
a
measure
of
the
average
speed
of
the
particles
in
a
substance
.
A
(
n
)
has
a
definite
volume
and
a
definite
shape
.
The
of
a
gas
is
represented
by
the
formula
f
/
A
,
where
f
=
force
pushing
on
the
walls
of
a
container
and
A
=
area
of
the
walls
of
the
container
.
A
(
n
)
has
neither
a
definite
volume
nor
a
definite
shape
.
is
the
inward
force
among
the
molecules
of
a
liquid
.
A
(
n
)
solid
has
a
definite
melting
point
.
A
(
n
)
solid
has
a
melting
point
range
.
Both
gases
and
liquids
are
.
Freezing
occurs
when
the
particles
of
a
liquid
enough
energy
to
take
fixed
positions
.
The
temperature
at
which
a
liquid
turns
to
a
gas
is
its
.
The
process
that
makes
ice
cubes
shrink
as
they
sit
in
a
freezer
is
called
.
The
process
where
bromine
gas
touches
a
surface
and
becomes
crystals
is
called
.
Particles
of
a
have
the
greatest
thermal
energy
.
Glass
is
an
example
of
a
(
n
)
solid
.
and
both
happen
at
the
surface
of
a
substance
.
Vaporization
is
the
reverse
process
of
.
The
temperature
at
which
a
liquid
turns
to
a
solid
is
called
its
.
is
the
reverse
process
of
freezing
.
Water
particles
in
gas
coming
off
a
pan
of
boiling
water
are
moving
than
the
particles
of
water
in
the
pan
.
and
are
both
forms
of
vaporization
.
occurs
at
any
temperature
when
a
liquid
becomes
a
gas
on
the
surface
of
a
substance
.
occurs
at
a
specific
temperature
when
a
liquid
becomes
a
gas
beneath
and
on
the
surface
of
a
substance
.
As
a
result
of
Rutherford
?
s
gold
foil
experiment
scientists
inferred
that
an
atom
?
s
charge
must
be
concentrated
in
the
of
the
atom
.
Mendeleev
created
the
first
periodic
table
by
arranging
elements
in
order
of
atomic
.
The
atomic
number
of
an
element
is
the
number
of
in
its
.
You
can
predict
an
element
?
s
based
on
its
location
on
the
periodic
table
.
Metals
are
,
,
and
can
carry
an
.
The
two
most
common
alkaline
earth
metals
are
and
.
At
room
temperature
,
more
than
half
of
the
nonmetal
elements
are
.
The
elements
that
do
not
react
to
form
compounds
under
normal
conditions
are
the
.
Beta
radiation
consists
of
particles
that
are
identical
to
.
Measurements
of
half
-
life
make
radioactive
isotopes
useful
for
determining
the
ages
of
and
.
The
elements
in
the
same
(
or
group
or
family
)
on
the
periodic
table
have
similar
properties
.
The
most
reactive
metals
on
the
periodic
table
are
found
in
group
one
,
periods
1
-
7
which
are
the
metals
.
Most
elements
on
the
periodic
table
are
classified
as
.
A
material
that
is
can
be
pulled
or
drawn
into
a
long
wire
.
In
an
atom
,
the
number
of
protons
and
electrons
are
.
Elements
in
the
same
row
on
the
periodic
table
have
periodic
properties
that
change
in
a
.
The
atomic
number
is
the
number
of
in
an
atom
.
Electrons
orbit
the
of
an
atom
.
Metalloids
have
properties
of
both
and
.
Electrons
are
charged
particles
in
an
atom
.
Fluorine
,
chlorine
,
bromine
,
and
iodine
are
all
part
of
the
family
.
The
atomic
nuclei
of
unstable
isotopes
release
fast
-
moving
particles
and
energy
in
a
process
called
.
The
-
of
a
radioactive
isotope
is
the
length
of
time
needed
for
half
of
the
atoms
of
a
sample
to
decay
.
Radioactive
isotopes
called
can
be
used
to
detect
some
medical
problems
.
A
piece
of
paper
will
provide
protection
from
.
The
series
of
in
Bohr
?
s
model
resemble
planets
orbiting
the
Sun
or
the
layers
of
an
onion
.
The
modern
periodic
table
is
organized
according
to
.
The
horizontal
rows
on
the
periodic
table
are
known
as
or
.
Nonmetals
can
be
found
on
the
side
of
the
periodic
table
.
Atoms
with
the
same
number
of
protons
and
different
numbers
of
neutrons
are
called
.
Scientific
theories
often
make
use
of
,
which
are
representations
of
an
idea
to
help
scientists
understand
what
they
cannot
directly
observe
.
Each
element
is
given
a
specific
that
usually
consists
of
one
or
two
letters
.
A
column
of
elements
on
the
periodic
table
is
called
a
or
a
because
they
have
similar
characteristic
properties
.
Elements
that
easily
transmit
electricity
and
heat
display
the
property
known
as
.
The
spontaneous
emission
of
radiation
by
an
unstable
atomic
nucleus
was
named
by
Marie
Curie
.
Mendeleev
discovered
that
periodic
patterns
appeared
when
he
arranged
the
elements
in
order
of
increasing
.
The
property
of
an
element
that
indicates
the
number
of
protons
in
its
atoms
is
the
of
that
element
.
The
chemical
reactivity
of
metals
tends
to
decrease
from
to
across
the
periodic
table
.
In
1869
,
Dmitri
Mendeleev
created
the
first
version
of
the
.
Most
metals
are
in
the
state
or
phase
at
room
temperature
.
The
is
the
very
small
center
of
an
atom
.
Elements
known
as
are
located
to
the
right
of
the
metalloids
on
the
periodic
table
.
At
room
temperature
,
all
the
are
solids
,
while
many
of
the
are
gases
.
Because
radioactive
isotopes
decay
at
a
predictable
rate
,
the
half
-
life
can
be
used
to
tell
how
old
a
material
is
by
the
process
of
.
Two
ways
a
proton
and
a
neutron
are
similar
are
they
have
the
same
and
are
both
located
in
the
.
Atoms
are
neutral
because
they
have
equal
numbers
of
and
.
The
mass
of
a
(
n
)
electron
is
so
that
it
doesn
?
t
really
change
the
mass
of
an
.
When
uranium
-
238
decays
into
lead
-
206
,
the
difference
between
the
of
uranium
and
lead
is
32
amu
,
while
the
difference
between
their
is
10
.
A
(
n
)
alpha
is
released
when
radium
decays
into
radon
,
while
a
(
n
)
is
released
when
changing
a
neutron
into
a
proton
when
lead
decays
into
bismuth
.
radiation
is
always
released
during
any
type
of
radioactive
decay
.
metals
react
violently
with
water
.
metals
tend
to
be
less
reactive
than
the
families
to
the
left
and
right
of
them
.
is
so
unique
that
it
could
easily
be
placed
in
either
group
1
or
group
17
.
have
properties
of
both
metals
and
nonmetals
.
The
element
in
group
18
,
period
4
is
and
it
would
be
a
gas
at
room
temperature
and
would
not
react
with
other
elements
.
Ionic
compounds
that
dissolve
in
water
conduct
electricity
because
they
break
into
ions
that
move
.
In
the
electron
dot
diagrams
of
,
magnesium
,
boron
,
,
,
oxygen
,
fluorine
,
and
neon
,
how
many
dots
should
be
drawn
around
each
of
the
elements
?
symbols
,
respectively
?
1
,
2
,
3
,
4
,
5
,
6
,
7
,
8
The
properties
of
can
be
explained
by
the
structure
of
and
the
bonding
among
the
metal
atoms
.
Orderly
crystal
shapes
,
high
melting
points
,
and
electrical
conductivity
when
dissolved
in
water
are
properties
of
.
When
electrons
are
shared
between
two
atoms
,
a
bond
is
formed
.
A
low
melting
point
is
one
property
of
compounds
.
A
bond
is
formed
when
two
atoms
share
electrons
equally
.
The
overall
charge
on
an
atom
is
0
;
the
overall
charge
on
a
compound
is
0
,
making
it
neutral
-
the
criss
-
cross
balances
(
cancels
out
)
the
and
charges
.
When
an
atom
loses
an
electron
,
it
becomes
a
(
n
)
charged
.
A
double
bond
is
when
two
pairs
of
electrons
are
shared
between
atoms
.
*
A
triple
bond
is
when
pairs
of
electrons
are
shared
between
two
atoms
.
Aluminum
foil
is
an
example
of
a
metal
that
is
.
A
chemical
bond
formed
when
two
atoms
share
electrons
is
called
a
(
n
)
bond
.
Electrons
involved
in
bonding
between
atoms
are
valence
electrons
located
farthest
from
the
nucleus
in
the
and
sublevels
that
have
a
negative
charge
.
Molecular
compounds
that
dissolve
in
water
do
not
conduct
electricity
because
no
ions
are
present
.
In
the
chemical
formula
for
an
ionic
compound
,
the
name
of
the
metallic
cation
is
written
first
.
A
mixture
made
up
of
two
or
more
elements
,
at
least
one
of
which
is
a
metal
is
called
a
(
n
)
.
is
a
(
n
)
nonpolar
covalent
molecule
because
the
valence
electrons
are
shared
equally
between
the
two
fluorine
atoms
.
Ions
that
are
made
of
more
than
one
type
of
atom
are
examples
of
.
An
ionic
bond
is
the
attraction
between
charged
ions
.
A
metal
crystal
consists
of
charged
metal
ions
embedded
in
a
sea
of
moving
valence
electrons
.
2
atom
(
s
)
of
a
halogen
would
need
to
react
with
one
atom
of
an
alkaline
earth
metal
to
be
.
Calcium
phosphate
is
an
ionic
compound
with
the
chemical
formula
Ca3
(
PO4
)
2
.
The
subscript
3
tells
the
number
of
ions
present
,
the
subscript
4
tells
you
the
number
of
ions
present
,
and
the
subscript
2
tells
you
the
number
of
ions
present
.
The
subscript
of
the
phosphorus
ion
present
is
1
.
Because
the
electrons
in
a
molecule
of
dihydrogen
sulfide
are
more
strongly
pulled
toward
the
sulfide
atom
,
the
molecule
is
.
The
most
reactive
metals
are
the
metals
.
Ionic
compounds
are
hard
,
brittle
.
Solid
metals
are
good
conductors
of
and
electrical
current
.
Most
molecular
compounds
have
melting
points
and
boiling
points
.
A
metal
crystal
consists
of
metal
cations
surrounded
by
a
.
Bonds
that
form
between
two
nonmetal
atoms
usually
are
covalent
bonds
.
When
cations
form
bonds
with
anions
,
the
charge
on
the
resulting
compound
is
zero
.
Ionic
compounds
are
.
In
order
to
determine
the
charge
on
a
metal
from
groups
3
-
16
,
you
must
the
criss
-
cross
and
know
the
charge
of
the
nonmetal
or
metalloid
anion
.
List
the
elements
in
the
group
containing
the
least
reactive
nonmetals
from
largest
radius
to
smallest
radius
.
Use
their
symbols
with
a
comma
and
space
in
between
each
element
.
,
,
,
,
,
,
Compounds
can
have
a
mixture
of
.
Manganese
(
II
)
phosphate
(
)
Hexabromine
undecafluoride
Calcium
pyrophosphate
(
)
All
chemical
reactions
are
accompanied
by
changes
in
energy
and
form
new
substances
with
new
.
In
an
endothermic
reaction
,
more
energy
is
than
is
released
.
In
an
exothermic
reaction
,
more
energy
is
than
is
absorbed
.
The
substances
formed
during
a
chemical
reaction
are
called
,
while
substances
that
are
undergoing
a
chemical
change
are
called
.
In
a
(
n
)
exothermic
reaction
,
the
products
have
energy
than
the
reactants
.
Water
boils
at
100°C
.
This
is
an
example
of
a
(
n
)
property
.
The
substances
that
are
having
their
bonds
rearranged
are
the
in
the
reaction
.
The
ability
for
methane
to
react
with
oxygen
is
a
property
.
Another
name
for
a
chemical
change
is
a
.
In
a
change
,
some
of
the
physical
properties
may
be
altered
and
the
chemical
composition
remains
the
same
.
Iron
replaces
copper
in
copper
(
II
)
chloride
Sodium
chloride
dissolves
in
water
2
Colorless
liquids
yellow
precipitate
Nail
corrodes
due
to
humidity
Nitrogen
dioxide
decomposes
into
N2
gas
and
O2
gas
Cold
pack
reacts
and
becomes
colder
In
a
balanced
chemical
equation
,
atoms
are
.
When
the
equation
Al
+
Br2
?
AlBr3
is
balanced
,
the
coefficient
for
Al
is
.
The
reaction
in
which
hydrogen
gas
and
oxygen
gas
are
produced
by
running
an
electric
current
through
water
is
an
example
of
.
A
reaction
that
has
two
compounds
as
reactants
and
two
compounds
as
products
is
most
likely
.
The
principle
that
states
that
matter
is
neither
created
nor
destroyed
during
a
chemical
reaction
is
called
the
Law
of
.
A
number
written
in
front
of
a
chemical
formula
to
show
the
actual
number
of
atoms
or
molecules
is
a
(
n
)
.
The
production
of
carbon
dioxide
gas
during
the
burning
of
a
fuel
is
an
example
of
a
(
n
)
reaction
.
In
a
chemical
equation
,
the
arrow
is
read
as
.
In
a
balanced
chemical
equation
for
the
formation
of
ammonia
(
NH3
)
from
nitrogen
gas
(
N2
)
and
hydrogen
gas
(
H2
)
,
the
sum
of
the
coefficients
is
.
The
formation
of
a
yellow
precipitate
in
the
reaction
between
silver
nitrate
and
potassium
iodide
showed
that
a
had
taken
place
.
Increasing
the
surface
area
of
the
reactants
will
increase
the
of
the
reaction
.
The
amount
of
a
substance
in
a
given
volume
is
the
of
the
substance
.
Adding
a
to
a
reaction
will
decrease
the
activation
energy
of
the
reaction
.
Adding
an
to
a
reaction
will
increase
the
activation
energy
of
the
reaction
.
In
an
reaction
,
the
energy
of
the
products
is
greater
than
the
energy
of
the
reactants
.
In
an
reaction
,
the
environment
becomes
warmer
.
Any
substance
that
speeds
up
or
slows
down
a
biological
chemical
reaction
is
called
a
(
n
)
.
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Fill in the missing words in this quiz concerning the Anatomy page of the website. You should read through the passage provided, and click the word you think fits from the list at the side. If you ...
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