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U
U
d
d
Drag
the
correct
quark
over
to
the
empty
place
to
make
a
proton
Correct!
A
proton
is
made
up
of
two
up
quarks
and
a
down
quark.
An
up
quark
has
a
charge
of
+2/3
and
a
down
quark
has
a
charge
of
-1/3
The
proton
will
have
an
overall
charge
of
+2/3
+
2/3
-
1/3
=
+3/3
=
+1
Next
Particle
Quarks
Factus
est
I,
MMXX
U
U
d
d
Drag
the
correct
quark
over
to
the
empty
place
to
make
a
neutron.
Correct!
A
neutron
has
no
charge
and
must
be
made
of
two
down
quarks
and
an
up
quark.
Two
down
quarks
=
-1/3
-1/3
=
-2/3
add
theup
quark
and
-2/3
+
2/3
=
0
Next
Particle
Quarks
Factus
est
I,
MMXX
Particles
Terminology
Word
Match
Drag
the
word
to
the
correct
term
in
the
list.
Meson
Baryon
Hadron
Boson
Fermion
Lepton
A
particle
built
from
one
quark
and
one
antiquark.
A
particle
made
up
of
three
quarks.
Any
particle
made
up
of
quarks
or
antiquarks
Quarks
and
leptons
belong
to
this
family.
These
particles
don't
build
particles
but
are
responsible
for
the
forces
such
as
the
electromagnetic
and
strong
forces.
This
family
of
particles
consist
of
the
electron,
muon,
tau
and
neutrinos.
Quarks
Factus
est
I,
MMXX