VUELA ALTO : UNIT 10: ENERGY AND FORCES

UNIT 10: ENERGY AND FORCES

WHAT IS ENERGY

What is energy? Energy is the ability to do work.
We need energy for everything we do.

TYPES OF ENERGY

There are many different forms of energy:

RENEWABLE AND NON-RENEWABLE ENERGY SOURCES

What is a renewable energy source? A renewable energy source is a source of energy that will never run out.

What is a non-renewable energy source? ...

Remeber: Is it forever???

LIGHT

- Def: Light is a form of energy.

- Light sources: Sun (Natural), Bulb (Man-made) and candles (Man- made).

- Properties: Light travels in all directions, light travels in straight line and light travels very fast.

PROPERTIES OF MATERIALS DEPENDING ON HOW MUCH LIGHT THEY LET THROUGH:

Transparent - Translucent - Opaque

THE COLOURS OF LIGHT

Light looks white, but it is actually made up of seven colours: red, orange, yellow, green, blue, indigo and violet, the colours of the rainbow.

Primary colours: red, green and blue.

Secondary colours: magenta, cyan and yellow

Red plus Blue makes Magenta

Red plus Green makes Yellow

Blue plus Green makes Cyan

Watch this video: http://www.youtube.com/watch?v=I_3cQpJQU-s

VUELA ALTO