Types of Electromagnetic Waves

Discovery of Fire

Electromagnetic Spectrum 


Types of Electromagnetic Waves

Discovery of Fire

Invention of Fire

Birth of the Solar System

Family and Technology



Jose Mari Chan Christmas Collection

Jose Mari Chan Christmas Collection

Light, Sound and Waves

These shows are similitude of our light show Science field trip in SM Pampanga 12/15/2012. 8:30-10:30am.
Note: Grade 7 (3rd quarter) lecture notes found at the bottom of this blog post. 

Science of Light

Light Show

Shadow Show

Amazing Laser Show

Laser Harp

Black Light Show

Science of Sound

Definition of terms:

Sound - a form of energy created by vibrationg objects.
Solids are best transmetters of sounds.
Frequency - is the number of vibration per seconds which the ear receives.
Intensity - is the rate at which the sound energy moves through a unit area to determine the pitch of sound.
Pitch - refers to the highness or lowness of tone.

Sound is produced by vibration with fundamental propeties such as frequency & intensity in a medium such as solid, liquid & gas

Light is a form of energy. It travels in a straight line. It has speed of approximately 3.0 x 108 m/s. It separates into differet colors known as spectrum. Rainbow is the spectrum of sunlight. It is disperse in different color such as red, orange, yellow, green, blue, indigo and violet
Light rays are regularly reflected by smooth shiny surfaces and are irregularly reflected by rough surfaces. It is refracted when they pass at an angle from one medium to another.