## CT Science Chapter 9 Motion and Energy

##### Created by:

kparker79  on December 11, 2011

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# CT Science Chapter 9 Motion and Energy

 The ability to do workEnergy
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#### Definitions

The ability to do work Energy
Energy that is stored
Example: Ball on a hill
Potential
Energy stored in a stretched object
Example: trampoline
Elastic potential energy
stored energy to an oject position Gravitational potential energy
Energy that is stored in the chemical bonds of atoms and compounds Chemical potential energy
form of energy that shows motion kinetic energy
Energy that is not created nor destroyed it just changes Law of Conservation of Energy
The act of casting back an image reflection
the storing of energy without such as light without being reflected absorbtion
the bending of light or sound when it passes from one thing to another refraction
an object that reflects light prism
when rainbow colors of invisible light can be seen using a prism spectrum
the ability to do work energy
the measurement of the energy used to perform a task work
work equals force times distance
Energy is measured in what unit joules
Energy that is stored in the position or structure of an object is called what potential energy
The 3 types of potential energy are chemical (peanut butter sandwich)
Elastic (slingshot)
Gravitational (ball at the top of a hill)
What is the energy of motion kinetic
Kinectic Energy can take many forms. 4 types of kinectic energy are heat, lightwaves, sound waves and electricity
Energy cannot be created or destroyed. It only changes forms. it changes from potential to kinectic and back to potential. This is called The Law of Conservation of Energy
These are examples of how energy can change form Heat does work on a loaf of bread and changes into chemical energy.

Electricity does work in an oven and changes into heat.

Friction inside an engine turns some of the kinectic energy into heat.
Light is made up of what...
Light can bend, bounce or get absorbed
When light bounces off a surface, this is called reflection
when a light wave disappears into a surface absorbtion
objects that let most of the light through transparent
objects that let some of the light through and it blurs translucent
objects that let little or no light through opaque
When light hits a mirror, it obeys the law of relection
the law that states that the angle of a light ray coming in equals the angle of the relected light bouncing off Law of Reflection
A mirror that curves is called a concave mirror
makes objects appear upside down
example front of spoon
concave
A mirror that curves out is called convex
makes objects appear smailler
example back of spoon
convex mirror
An object in a glass of water appears to bend. However the object in not bending. The light is bending becuase the light changed speed when it hit the water
When light waves change speed, they refract
The bending of light refraction
Lenses are used in eyeglasses. Lenses use refraction to shape images. What kinds of lens takes the light rays that pass through and bend them inward to a point Convex lenses
are used in magnifying glasses. When light passes through the lense, the light spreads out in many directions making the object appear bigger. Concave lenses
White light is refracted by raindrops in the sky and spreads out into a rainbow. You can also separate white light using a prism
a cut peice of clear glass or plastic in the form of a triangle prism
the band of color in a rainbow is called a spectrum
The acronym used to remember the colors of the specturm is ROY G BIV
name the colors of the specturm in order red, orange, yellow, green, blue, indigo, violet
what color has the longest wavelength red
what color has the shortest wavelegth violet
a window is called a medium
Examples of mediums glass, plastic, paper, metal concrete, wood, water H2O, fabric
light can do 3 things when it hits a medium bounce = relect
soak = absorb
bend = refract

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