Transcript energy - Amazon S3


You may not have used a solar car to get to
school today, but the energy needed for the trip
came from… the Sun!

How is that possible?
Where did the car or bus
get its kinetic energy?
The car’s
kinetic
energy
comes
from
burning
fuel.
Fuel’s
chemical
energy comes
from
decomposed
microorganisms that
lived in the sea.
The tiny
animals get
their energy
by eating
plants, which
get their
energy from
the sun.
The sun gets
its energy
from the
atoms inside
it. The sun is
the source of
almost all the
energy on
earth.
If you walked to school, where did
you get your kinetic energy?
Your energy to
move comes
from burning
food.
The chemical
energy in eggs
comes from the
plants the chicken
ate.
The sun gets its energy
The chickens get their
from the atoms inside it.
energy from plants,
The sun is the source of
which get their
almost all the energy on
energy from the sun.
earth.
CHALLENGE: Make your own diagram tracing
back the energy in a toaster as far as you can go!

Unlike matter, energy does not have mass or
take up space. People and things all around
us have energy, but we cannot observe
energy directly. Instead, we see only the
effects of energy. The wind blows our hair, a
toaster browns our bread, or gasoline fuels
our car. These are examples of changes that
energy causes in matter.
From p.51, Gateways to Science Grade 6

Follow these directions with your partner:
1.
Hold the neck of the bottle in the ice water
for a few seconds.
2.
Place the penny over the mouth of the jar.
3.
Place some oil around the bottles opening or
on the penny in order to provide a
completely air tight seal.
4.
Now hold bottle in your hands and carefully
observe the penny
KINETIC
ENERGY
At first, the air
inside the bottle is
cold, so the air
molecules are closer
together.
When you hold the
bottle, heat energy from
your hands warms the air
in the bottle.
The air then moves more,
pushing against the bottle,
including the penny at the top,
causing it to move.
STATION 1
-The ball is less dense than the water
so it rises back to the surface.
STATION 3
- Striking the tuning fork causes
air molecules to bounce
between the two sides of the
fork. This makes sound waves
and moves the ping pong ball.
STATION 2
-The car starts at rest and
speeds up as it rolls down
the ramp. It makes noise
as it reaches the bottom.
STATION 4
-The dish soap causes the fat in
the milk to break down and move
away from the other fat particles.
-The food coloring lets us see the
movement caused by the reaction
between the soap and the fat.
Mrs. Cent Foldable – Energy Types
GLUE
THIS
COLUMN
TO
YOUR
SCIENCE
JOURNAL
Mechanical
Radiant
Sound
Chemical
Electrical
Nuclear
Thermal
- energy due to an object’s motion
(kinetic) or position (potential)
- the energy of electromagnetic radiation
(light, x-rays, ultraviolet, radio waves, infrared, etc)
-vibration that moves through matter to our ears
- energy stored in chemical bonds and
released in chemical reactions
- energy generated through electricity
- energy released during a nuclear reaction
(fusion or fission of an atom)
(heat)- energy that changes the temperature
of an object…… include a drawing for each form of energy!
A. Nuclear
B. Sound
C. Mechanical
D. Radiant
A. Nuclear
B. Sound
C. Mechanical
D. Chemical
A. Radiant
B. Mechanical
C. Electrical
D. Radiant
FOOD
FOSSIL
FUELS
STATION 1
Your hand transferred moving or
mechanical energy to the ball.
Because of gravity, the water moved
the ball upwards.
Mechanical to Mechanical
(Potential to Kinetic)
STATION 3
Striking the tuning fork gives it
mechanical energy and produces
sound energy (moving air particles).
The sound energy then transforms
into mechanical energy that moves
the ball.
Mechanical to Sound to Mechanical
STATION 2
Gravity pulling the car downward
transformed mechanical (potential)
energy into mechanical (kinetic) energy.
Mechanical to Mechanical
(Potential to Kinetic)
STATION 4
The dish soap broke bonds in the fat
molecules in the milk, causing the milk to
move when the chemical energy was
released.
Chemical to Mechanical
Thermal
Energy
Electrical
Energy
Mechanical
Energy
Sound
Energy

The Law of Conservation of Energy states
that energy can neither be created nor
destroyed, it just changes form!
Energy
Before
Energy
After
Thermal
Energy
Electrical
Energy
100 J
60 J
Mechanical
Energy
Sound
Energy
10 J
30 J

So we can’t make energy, but energy can be
made more useful by changing it from one
form to another.

Record at least three examples of how energy
is changed from one form to another to make
it more useful in your own life.
?
?