TRADE

Producers obtain and make products to sell.

Transporters distribute the products to the shops.

Sales people sell the products or services to the consumers.

Consumers buy the finished product. 

Occupations:

http://www.educa2.madrid.org/binary/703/files867/

Types of trade:

http://www.primaria.librosvivos.net/archivosCMS/3/3/16/usuarios/103294/9/ud14_4EP_Science_tiposcomercio_1/frame_prim.swf 

Work and professions:

http://agrega2.red.es//repositorio/01022010/73/es_2009063062_7240134/index.html

Types of services:

http://www.primaria.librosvivos.net/archivosCMS/3/3/16/usuarios/103294/9/ud14_3EP_Science_Types_services_1/frame_prim.swf  

RENEWABLE AND NON-RENEWABLE ENERGY SOURCES

We can classify the main energy sources into two groups:

Renewable energy sources. These sources will never run out. We can use them again and again, for example, the Sun, water and wind.

ENERGY

We need energy for everything we do.

There are many different forms of energy:

• Electrical energy is the energy that makes machines in our homes work.