SCIENCE ENERGY and MOTION. All the lights in your house need energy. So do the refrigerator and washing machine and computer. What else needs energy?. What do you and a car have in common? You both need energy! Gasoline is the car’s source of energy.
SCIENCEENERGY and MOTION
All the lights in your house need energy. So do the refrigerator and washing machine and computer.
What else needs energy?
What do you and a car have in common?
You both need energy!
Gasoline is the car’s source of energy.
Food is your form of energy. Healthy foods give your body the energy it needs.
Match up each item to its source of energy.
ENERGY is the ABILITY to CAUSE CHANGE in MATTER.
EVERYTHING THAT MOVES HAS ENERGY!
These kids need energy to run.
They get their energy from eating healthy foods.
When a roller coaster car climbs
a hill, it seems to stop at the top
for just a moment.
Then it speeds down to the bottom.
Something in motion, like a girl on a pogo stick, has
KINETIC ENERGY is ENERGY in MOTION.
The roller coaster hovering at the top of a hill has
POTENTIAL ENERGY is the energy something has because of its position or condition.
is the total
of an object.
The girl pushes the
pogo stick spring down.
The spring has
When the spring spreads
out, the pogo stick
goes up and now has
As a roller coaster
climbs to the top of a
hill, it gains POTENTIAL ENERGY.
The higher the coaster
climbs, the more
the cars have.
As the coaster comes
down the hill, the
of the changes in
MECHANICAL ENERGY =
POTENTIAL ENERGY + KINETIC ENERGY
FLASH and BOOM
You see lightning flash across the
sky. Then you hear a boom that
is so loud, it makes your heart pound.
Lightning and Thunder are two
Forms of Energy.
Lightning can be hotter than the
surface of the sun. It makes the
air around it rapidly expand. This
causes the BOOM of thunder.
Do the Math
How far away was that lightning strike?
As soon as you see a flash of lightning,
count the seconds until you hear
thunder. Then divide the number of
seconds by 5. This gives you an
approximate distance in miles.
is produced and used in
Light is a form of energy
that can travel through
Plants use light from the
sun to make food.
That same LIGHT ENERGY
from the sun allows us to see.
Another source of LIGHT ENERGY
is electricity. If we couldn’t use
electricity to produce
LIGHT ENERGY it would be difficult
to work or play after dark.
Another form of energy is
Sound is made when something
moves back and forth. This motion
Sounds can be described in
describes how high or low
a sound is.
LOUD sounds have more energy
than quiet sounds.
ENERGY is all around us.
You could not do without energy for even one day.
is energy that is released by a
is energy that comes from electric
from the food we eat gives us the energy we need to grow and move.
Most cars run on gasoline.
Gasoline is a source of
Fire releases chemical energy that
provides heat and cooks our food.
is energy that comes from electric
Anything plugged into a wall outlet
uses electrical energy.
Electricity is generated using the chemical
energy released during the burning of
The sun, wind, and water can also
Solar Power Water Power
ENERGY CAN CHANGE FORM
Electrical energy changes to light energy
when you turn on a light switch.
You feel heat energy given off by
many light bulbs.
Chemical energy in gasoline changes
to mechanical energy when a driver
presses the gas pedal.
Chemical energy changes into light
energy in a glow stick.
Glow sticks have a glass tube
inside that has chemicals inside.
When you bend the glow stick, the
tube breaks. The chemicals mix
together and when they mix, light
energy is given off.
Radio Waves are a form of energy.
A remote control sends radio waves
to a remote-controlled car.
The radio waves change to electrical
energy to tell the motor
what to do:
start – stop – go faster.
The car also has batteries to change
chemical energy to electrical energy
to move the car.
Energy is the ability to cause change in matter.
Everything that moves has energy.
Kinetic energy is energy of motion.
Potential energy is the energy something
has because of its position.
Mechanical energy is the sum of kinetic energy
and potential energy.
Light energy allows plants to make food and
helps us see and stay warm.
Sound energy is caused by vibrations.
Energy can change from one form to another.
A dam can be
of falling water
Energy made using falling water is known as
People have always used water’s energy to move things. Before boats had engines, ferries and rafts used the motion of rivers to carry people and goods from place to place.
Mills powered by water have been used for hundreds of years. Water flows over the wheel to turn it. The wheel turns an axle that turns a mill wheel or another device.
4. The water then flows back into the river.
Wind mills, like water mills,
have been used for hundreds of
years. They move because of
Wind energy is energy produced
by moving air.
Windmills used to be used to
Today, windmills are used to
The wind’s kinetic energy causes the
turbine’s blades to move.
The generator changes this energy
of motion into electrical energy.
One wind turbine can make enough
electrical energy to power our
Wind and Water are clean
They do not hurt our environment
and they are both renewable
Wind energy is
used by kites,
gliders and birds
as they fly.
wind energy to
sail the seas.
Renewable Energy is our Future
One day we will run out of fossil
fuels like coal, petroleum, and
If we want to continue using
electricity, we must find ways to
use other sources of energy.
Fossil fuels are NONRENEWABLE.
When they are gone, they’re gone.
Water and wind are renewable
sources of energy.
Biofuels, which are made from living
things, are renewable resources
Solar energy is a renewable
source of energy.
Windmills and water energy
are also renewable.
Another renewable energy source is HYDROGEN.
This car has a tank filled with hydrogen
instead of gasoline.
The hydrogen goes to a fuel cell, where the
Hydrogen mixes with oxygen to produce electricity.
Wind and water are two important
sources of renewable energy. People
have long used water’s energy to move
people and things. Windmills were often
used to grind grain.
Today, we use wind energy and water
energy to drive generators.
The generators change mechanical
energy into electrical energy.