2. Table
of
Contents
! 1.
Aristotle’s
Free
Fall
! 2.
Aristotle’s
Flotation
! 3.
The
Telescope
! 4.
The
Thermometer
! 5.
The
Pendulum
! 6.
Pictures
3. Aristotle’s
Free
Fall
! The
great
Aristotle
got
some
of
his
theories
incorrect,
but
most
of
them
were
right,
and
he
changed
the
world.
! Aristotle
said
that
heavier
objects
fell
faster
than
lighter
objects.
Galileo
tested
it,
and
discovered
that
Aristotle
was
wrong.
Gravity
effects
everything
the
same.
! Because
of
our
greater
understanding
of
gravity,
we
will
be
able
to
discover
more
things
with
our
knowledge.
We
have
traveled
to
the
moon
and
back,
and
perhaps
may
go
even
further
next
time.
Here’s
a
video:
5. Aristotle’s
Flotation
! Aristotle
said
that
shape
alone
effects
whether
something
floats.
To
float,
an
object
must
be
thin,
flat
and
smooth,
or
a
smooth
sphere.
! Galileo
tested
this
theory.
He
said
that
an
object
must
be
less
dense
than
water
to
float,
and
he
was
right.
! Because
Galileo
did
this,
we
are
now
able
to
make
floating
pool
toys
and
boats.
Columbus's
and
Cook’s
boats
were
made
of
wood.
Wood
floats.
Their
discovery
changed
the
world,
and
Galileo
secretly
helped
them
to
victory.
7. The
Telescope
! In
1609
a
man
named
Hans
Lippershey
invented
the
telescope.
It
could
see
objects
that
appeared
to
be
a
few
steps
away,
and
the
image
was
up-‐side-‐down.
! Galileo
decided
he
could
improve
the
telescope,
and
he
did.
His
was
much
more
powerful,
and
the
picture
was
not
up-‐side-‐down.
! With
the
telescope,
people
could
know
if
an
army
was
attacking,
or
a
rock
was
in
front
of
a
ship,
or,
like
Galileo,
you
could
see
the
stars
and
the
planets.
We
went
to
the
moon
because
we
saw
it
in
Galileo’s
telescope
and
got
curious.
He
changed
the
world.
9. The
Thermometer
! People
needed
a
way
to
tell
the
temperature
outside
or
inside,
and
Galileo
was
the
man
for
the
job.
! Galileo
was
taking
medical
school
at
the
University
of
Pisa.
His
first
invention
was
the
thermometer.
! People
wanted
to
know
how
cold
or
hot
it
was,
so
the
thermometer
was
created.
It
changed
the
world
because
you
may
not
know
if
it’s
cold
enough
for
a
jacket,
and
then
you
get
sick,
and
you
could
die
in
the
old
days,
so
one
of
Galileo’s
discoveries
once
again
saved
people’s
lives,
and
an
important
person,
such
as
Columbus,
could
have
get
sick
and
die
and
we
would
still
think
the
world
was
flat.
11. The
Pendulum
! Doctors
needed
a
better
way
to
tell
for
a
person’s
pulse.
Clocks
were
to
unreliable
and
incorrect.
! Galileo
saw
a
regularly
swinging
lamp
at
the
church
one
Sunday.
He
measured
the
swings
with
his
pulse.
He
began
Pendulum
experimenting.
!
Clockmakers
could
make
accurate
clocks
so
people
would
know
when
something
started
or
ended
or
how
long
something
took.
Doctors
made
a
device
called
a
pulsilogia,
which
measures
a
patient’s
pulse.
Once
again,
one
of
Galileo’s
discoveries
saved
people’s
lives.