13 abr. 2012


We are going to finish the Unit 5 with this investigation work. 
Read the following text:

Energy is the ability to do work”

It comes in different forms: heat (thermal), light (radiant), mechanical, electrical, chemical, and nuclear energy. Energy is in everything. We use energy to do everything we do, from making a jump shot to baking our favorite cookies to sending astronauts into space, Energy is there making sure we have the power to do it all.

All forms of energy are stored in different ways, in the energy sources that we use every day. These sources are divided into two groups:

  • RENEWABLE (an energy source that can be replenished in a short period of time):
    • solar energy, which comes from the sun and can be turned into electricity and heat.
    • Wind
    • Geothermal energy from inside the earth
    • Biomass from plants
    • Hydropower
    • Ocean energy from water 
  • NONRENEWABLE (an energy source that we are using up and cannot recreate in a short period of time).
However, we get most of our energy from nonrenewable energy sources, which include fossil fuels: oil, natural gas, and coal. They're called fossil fuels because they were formed over millions and millions of years by the action of heat from the Earth's core and pressure from rock and soil on the remains (or "fossils") of dead plants and animals. Another nonrenewable energy source is the element uranium, whose atoms we split (through a process called nuclear fission) to create heat and ultimately electricity.

Translate the following keywords of the unit:

  • thermal:
  • radiant:
  • mechanical:
  • eléctrical:
  • chemical:
  • nuclear:
  • renewable:
  • nonrenewable:
  • fossil:
  • oil:
  • coal:
  • uranium:

Answer the questions in the slides, explaining with your words in your notebook. You can obtain all the informatión you need following the steps in the next slides:
(better in fullscreen --arrows in the bottom-right corner--)