martes, 28 de septiembre de 2010

Importance of water on Earth

We have to protect water because the water is important to our body.If we don´t have water we can die.
People throw trash in water,ground,floor,etc.But people don´t know that if they contuniued trhowing trash in the floor, ground,and water they are helping Earth to help us to die.SO....DON´T THROW TRASH IN ANY PLACE.




Clean water



Vocabulary 1

Bioluminescene: light produced by living organism


Light ray: a straight line beam of light as it travels outward from its source



Law of reflection: the angle of an incoming light ray equals the angle of the reflected ray



Concave mirror: a mirror that curves in on the shiny side


Convex mirror: a mirror that curves out on the shiny side



Vocabulary 2

Opaque: dont letting light to pass trough an object