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All about sound and light
Science, Grade 2
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Study Guide All about sound and light Science, Grade 2
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SOUND
AND
LIGHT
How
is
Sound
Made?
Sound
is
made
because
of
something
vibrating.
Vibrate
means
to
move
back
and
forth
really
fast.
Vibrations
travel
through
the
air
and
into
your
ear.
You
hear
sounds
when
vibrating
air
causes
your
eardrum
to
vibrate.
We
use
different
parts
of
our
ears
to
hear
sounds.
Let’s
check
what
we
have
learned
so
far:
What
does
vibrate
mean?
How
Are
Sounds
Different?
Some
sounds
are
LOUD
and
others
are
quiet
.
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Strong
vibrations
make
loud
sounds.
Gentle
vibrations
make
quieter
sounds.
Volume,
when
referring
to
sound,
is
how
loud
or
quiet
a
sound
is.
Let’s
check
what
we
have
learned
so
far:
What
vibrations
make
LOUD
sounds?
How
Does
Sound
Travel?
Vibrations
caused
by
sound
waves
cause
us
to
hear
sounds.
Sounds
travel
in
waves.
Sound
waves
are
invisible.
The
farther
sound
waves
travel,
the
quieter
the
sound
becomes.
Sound
can
travel
through
all
matter.
Let’s
check
what
we
have
learned
so
far:
Can
we
see
sound
waves?
How
Do
People
and
Animals
Make
Sounds?
You
make
sounds
when
you
talk
because
your
vocal
chords
vibrate
when
air
passes
through
them.
You
know
that
animals
make
MANY
different
sounds:
some
chirp,
some
bark,
some
neigh,
some
say
‘oink
oink’
and
others
‘meow’!
© Copyright NewPath Learning. All Rights Reserved.
Permission
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granted
for
the
purchaser
to
print
copies
for
non-commercial
educational
purposes
only.
Visit
us
at
www.NewPathLearning.com.
LIGHT:
What
is
Light?
Light
is
also
a
form
of
energy.
Light
is
energy
that
travels
at
very
high
speeds.
When
an
object
blocks
light,
a
shadow
is
created.
Let’s
check
what
we
have
learned
so
far:
What
is
light?
Where
Does
Light
Come
From?
Light
is
brightness
that
comes
from
an
object
such
as
a
flashlight,
a
candle,
the
sun,
or
a
lamp.
The
SUN
is
the
Earth’s
MAIN
source
of
light!
Light
from
the
sun
also
heats
the
Earth.
Sunlight
causes
plants
to
grow.
The
sun's
energy
is
stored
inside
of
the
plants.
© Copyright NewPath Learning. All Rights Reserved.
Permission
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granted
for
the
purchaser
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print
copies
for
non-commercial
educational
purposes
only.
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us
at
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Light
travels
in
a
straight
line.
Light
can
bounce
off
of
objects.
For
example,
light
can
bounce
off
a
mirror.
Some
objects
are
transparent,
which
means
light
passes
all
the
way
through
them,
and
we
can
see
where
the
light
goes.
An
example
of
a
transparent
object
is
a
window.
Other
objects
are
opaque,
which
means
they
block
any
light
from
going
through
them.
An
example
of
an
opaque
object
is
a
brick
wall.
Let’s
check
what
we
have
learned
so
far:
What
is
our
MAIN
source
of
light
here
on
Earth?
© Copyright NewPath Learning. All Rights Reserved.
Permission
is
granted
for
the
purchaser
to
print
copies
for
non-commercial
educational
purposes
only.
Visit
us
at
www.NewPathLearning.com.
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