Saturday, 21 February 2015

MACHINES

Machines make our life easier. 

Simple machines have been used since long ago. 


Click on the links to learn more about them.


What is a LEVER?


- What is a PULLEY?


- What is a WEDGE?


What is an INCLINED PLANE?


- What is a SCREW?


- WHEEL and AXLE


You can watch them as many times as you like!!! 


NON-RENEWABLE ENERGY SOURCES

Have you ever wondered how crude oil, natural gas and coal were formed? 
Did you know they are also called Fossil Fuels?

Watch the next videos to learn more!

- Crude oil and gas formation

- Coal

- Fossil Fuel formation




RENEWABLE ENERGY SOURCES


Renewable energy sources can be used again and again.

From all these sources, it is important to remember that biomass and wood are only renewable if the trees and crops are replanted.


- Solar energy
- Wind energy
- Water - Hydroelectric power
- Biomass
- Geothermal energy 

Watch this video if you want to know more about the 10 Future Energy Sources.

And... if you have time you can watch Bill Nye the Science Guy full episode about energy!

ENERGY SOURCES

There are different energy sources that can be divided into two groups: renewable and non-renewable

In this video you will learn about sources of energy, the difference between renewable and non-renewable energy sources and ways to conserve energy right at home! 

ENERGY

Energy is the ability to do work. Any change needs energy.
Here you have some of the videos we've watched during lessons. I hope you enjoy them!


There are different forms of energy. You can revise them watching Tim&Moby's video.


video


Nick Lucid made us learn and laugh at the same time. Do you remember?

video



If you don't have it clear yet, here you have another good explanation.

video

It is also important to know what things we can do to save energy. 

video