1. © Oxford University Press España S. A., 2012
EnergyEnergy

2. What do we know?

3. Energy
Where do these vehicles get the energy they need to function?
How is the chemical energy of fuel transformed into movement?

4. Transformation of energy
How is energy transformed in each of these photos?
What does the ‘principle of energy conservation’ state?

5. Non-renewable energies and the environment
What effects does the use of non-renewable energies have on the
environment?
Do you have any suggestions of how to stop these problems getting worse?

6. Renewable energy sources
What types of renewable energies are being produced in these photos?
Give some advantages and disadvantages of each one.

7. The internal combustion engine
Can you identify the four parts of the four-stroke cycle (intake,
compression, combustion-power, exhaust) in this image?
What fuels does an internal comustion engine use?

8. What have we learned?
EnergyEnergy
Types of energyTypes of energy
Capacity of an object to transform an energy source into work.
Mechanical, nuclear, thermal or calorific, chemical,
electrical, electromagnetic, and sound.
Transformation
of energy
Transformation
of energy
The law of conservation of energy: Energy cannot be
created or destroyed; it can only be transformed.
Measurement
units
Measurement
units Joules, in the International System, and calories.
Energy
sources
Energy
sources
Non-renewable:
comes from limited natural
resources
Non-renewable:
comes from limited natural
resources
Natural resources that provide different forms of energy.
Nuclear energy, energy from fossil fuels (coal,
petroleum and natural gas).
Renewable: comes from
abundant natural resources
that, in principle, are
unlimited
Renewable: comes from
abundant natural resources
that, in principle, are
unlimited
Hydraulic, solar, wind, marine, geothermal,
biomass and MSW energy.

9. What have we learned?
Heat
engines
Heat
engines
External combustion
engine
External combustion
engine
Transform thermal energy from a fuel into mechanical energy to perform work.
Steam engine and steam turbine.
Internal combustion
engine
Internal combustion
engine
Combustion engine and turbojet.

10. What have we learned?
Heat
engines
Heat
engines
External combustion
engine
External combustion
engine
Transform thermal energy from a fuel into mechanical energy to perform work.
Steam engine and steam turbine.
Internal combustion
engine
Internal combustion
engine
Combustion engine and turbojet.