Vocabulary#4

1.Electomagnetism: the production of magnetism by electricity and the production of electricity by magnets.

2.Electromagnetic spectrum: all the wavelengths of visible light in order from short ( gamma rays ) to long ( radio ).

3. Laser: a device that produce a thin stream of light of just a few close wavelenghts.

Vocabulary#3

1.Prism: a cut piece of clear glass ( or plastic ) with two opposite sides in the shape of a triangle or other geometrical shape.

2.Spectrum: a band of colors produced when light go through a prism.

3. Primary colors: red, green, or blue; mixing these colors can produce all the colors of the spectrum.

4.Primary pigment: magenta, cyan, yellow; material with any of these colors absorbs one primary colors of light and reflect the other two.

Vocabulary1

1.Bioluminicence: Light produced by livin organisms.

2. Light ray: A straight-line beam of ligth as it travels outward from its source.

3. Law of Reflection: The angle of an incoming light ray equals the angle of the reflected ray.

4.Concave mirror: A mirror that curves in on the shiny side.

5. Convex mirror: A mirror that curves out on the shiny side.

Science Project#1 (Invisible Ligth)

Ultraviolet light:  Ultraviolet light(UV)light is made up of waves just shorter than visible violet light on the spectrum.UV light causes chemical changes.It can produce vitamin D in your boby.

Radio Wave: Radio Waves are the longest waves of the electromagnetic spectrum.Broadcast stations use them carry signals in a kind of code AM FM.

Microwave: Microwaves are shortwave radio waves.Water in foods absorbs microwaves very readily.The energy from the absorbed microwaves speeds up the water molecules inside the food.

EXAMPLE

X Rays and Gamma Rays: The shortest wavelenghts of the spectrum-X rays and Gamma rays-have great penetrating power.

VOCABULARY 2

1. OPAQUE: a material that do not let light pass through them.
The book is an opaque material.

2. TRANSPARENT: a material that let all the light pass through them.
The glass is a tranparent material.

LEARN MORE ABOUT MATERIALS




3. Translucent: Letting only some light through,so that objects on the other side appear blurry.

4. Polarization: allowing light vibratios to pass through in only one direction.

5. Refraction: the bending of light rays as they pass from one substance into another.

6. Convex lens: A lens that curves outward(is thicker at the middle than at the edges)and brings lights rays together.

7. Concave lens: A lens that curves inward(is thicker at the edges than at the middle)and spreads light rays apart.