Transcript Nuclear energy

UNIT 10 –ENERGY
ENERGY TYPES AND ENERGY SOURCES
ESO 2 – SCIENCE
2009/2010
Ms. Mireia Molera
EUROPA INT. SCHOOL
UNIT 10 –ENERGY TYPES AND
ENERGY SOURCES
• Previous concepts about
energy
• What is energy?
• Types of energy
• Traditional sources of energy
• Alternative sources of energy
PREVIOUS CONCEPTS ABOUT ENERGY
ENERGY IS THE
DRIVING FORCE OF
THE WORLD
•Energy from muscles
•Energy from animals
•Energy from water and
wind
•Energy from fuels
•Energy from electricity
TYPES OF ENERGY
Chemical energy
Electrical energy
Thermal energy
Electromagnetic
energy
Mechanical energy
Nuclear energy
1. WHAT IS ENERGY ?
Energy is the capacity to
produce changes in
material systems.
Whenever
a change is
produced,
energy is
involved.
TYPES OF ENERGY
Chemical energy
Electrical energy
Thermal energy
Electromagnetic
(Light and Sound)
Mechanical energy
(Kinetic and
Potential)
Nuclear energy
Nuclear Fusion)
(Nuclear Fission and
JOHN
DALTON
– Model atòmic
Chemical
energy
Chemical energy is the
energy stored by fuels or
batteries (chemical
compounds).
It is released during
chemical reactions
Batteries
Chemical reactions
JOHN
DALTON
– Model atòmic
Electrical
energy
Electrical energy that is
transported by electrical
charges running along the
circuit.
It is easily transformable
into other energies, such
as thermal or light
energy.
JOHN
DALTON
– Model atòmic
Thermal
energy
Thermal energy is an
energy that is
interchanged when
two systems at
different temperature
come into contact.
This is energy which is
released as heat.
JOHN
DALTON – Model energy:
atòmic
Electromagnetic
Light energy from the Sun
allows plants to
manufacture the foods
which animals consume.
Light energy
JOHN
DALTON – Model
atòmic Sound
Electromagnetic
energy:
Sound energy is the
energy the air carries. It
is always produced by
movement.
energy
JOHN
DALTON –energy
Model atòmic
Mechanical
Mechanical energy is the
energy objects have due
to movement or their
position:
-Kinetic energy
(movement)
-Potential energy
(position)
JOHN
DALTON
– Model atòmic
Nuclear
energy
Nuclear energy is stored
in the nuclei of atoms
• Nuclear fission
(splitting of atoms)
• Nuclear fusion
(combination of
atoms)
Uranium is a silverywhite metal that is used
in nuclear power
stations
JOHN
DALTON CHANGES
– Model atòmic
PHYSICAL
A physical change may
cause any of the
following:
- Change of position
- Changes of state
- Deformation
- Variation in temperature
JOHN
DALTON –CHANGES
Model atòmic
CHEMICAL
When a chemical changes
occur, the following
usually also occurs:
• Bubbles are formed
• Change of colour
• Change of temperature
JOHN
DALTON – Model atòmic
2. NON-RENEWABLE
SOURCES OF ENERGY
1. COAL
2. OIL
3. NATURAL GAS
4. URANIUM
JOHN
DALTON – Model
atòmic
3. RENEWABLE
SOURCES
OF ENERGY
1. BIOMASS ENERGY
2. HYDROELECTRIC ENERGY
3. SOLAR ENERGY
4. EOLIC ENERGY
5. GEOTHERMAL ENERGY
6. TIDAL ENERGY
RENEWABLE / NON-RENEWABLE
SOURCES OF ENERGY
Geothermal
Coal
Biomass
Butane gas
Petroleum
Wind
Uranium
Natural gas
Solar
Hydropower
SOURCES OF ENERGY
RENEWABLE
Geothermal
Biomass
Wind
Solar
Hydropower
NON-RENEWABLE
Coal
Butane gas
Petroleum
Uranium
Natural gas
THE ENERGY OF FOODS
The human body
obtains the energy it
needs (movement of
the muscles, activities
of various organs,
etc.) from nutritional
products.
Energetic value of foods:
(Kcal/100 g or kJ/100 ml)
UNIT 10 - Conceptual Map