Download Earth Science

Earth Science
Earth and Energy Systems
Earth Science
Energy and Waves
Comprehensive
Do Now
 Pick
up the worksheet “Energy Day 1 Do
Now”
Do Now Extended Questions
 What
is happening when energy is
applied to one ball?
 What kind of energy is present when the
ball is held up? What kind of energy is
present when the ball is released?
 What happens when you pick up and
release two balls at once? Why does this
happen?
Essential Question
 How
are the different forms of energy
related?
What is Mechanical Energy?
 Energy
due to a object’s
motion (kinetic) or position
(potential).
 The bowling ball has
mechanical energy.
 When the ball strikes the
pins, mechanical energy is
transferred to the pins!
Kinetic vs Potential
 Kinetic

is the energy of movement
The faster an object moves, the more kinetic
energy it has.
 Potential
is stored energy
Gravitational Potential Energy is potential energy in
relation to gravity (like a ball being held in the air
before releasing)
Potential when at
 Elastic Potential is the energy
rest
stored as a result of deformation of
an elastic object, such as the
stretching of a spring.

Kinetic on its
way up
What is Electromagnetic
Energy?
 Light
energy
 Includes energy from gamma rays, xrays, ultraviolet rays, visible light,
infrared rays, microwave and radio
bands
What is Chemical Energy?
 Energy
that is available for release
from chemical reactions.
 The chemical bonds in a matchstick
store energy that is transformed into
thermal energy when the match is
struck.
 Food is chemical energy that our
bodies require.
Examples of Chemical Energy
What is Thermal Energy?
Heat
energy
The heat energy of an object
determines how active its atoms
are.

Hot object = atoms and molecules
are excited and show rapid
movement.
 Cool object = molecules and
atoms show less movement.
Friction, the “anti” movement
 Friction
is a force that causes resistance
when two or more objects push against
each other.
 Energy is transferred out due to this force.
 The reason why car brakes work is due to
the friction of the brake pad taking the
kinetic energy away from the car’s
movement.
Energy Transfer vs Transformation
 Transfer


The process of
transferring energy
from one body to
another.
Ex: Dropping a ball
into sand takes
kinetic energy from
the ball and transfers
it to the sand
 Transformation


The process of
transforming one
form of energy to
another.
Ex: Food changing
from chemical
energy to
mechanical when
running
Energy Transfer and Transformation
GPE
Transformation
Changes to KE
Transfer of kinetic energy
though Newton’s Cradle
Exit Ticket
 Pick
a sport you are familiar with. Can
the Law of Conservation of Energy be
applied when playing that sport?
Explain your reasoning.