Jamie Azulay and James Avtges Spring 2010 Room 2121

Potential energy is stored energy. It is called potential because it has the potential to be converted to other forms of energy. Kinetic energy is the extra energy an object possesses to use its motion once it has accelerated. Kinetic energy is the energy in motion. When the ball is on top of the hill, it has potential energy because it can be transferred into kinetic energy if it’s pushed down the hill. When the guy is going down the hill, he possesses kinetic energy because he’s in motion and his potential energy has transferred to kinetic. Work is the ability to move something from one place to another. (work= an object+ force + motion) Energy is the ability to work and to make a change. Force is a push or a pull The forms of energy are light, sound, heat, electrical, chemical, and mechanical.

The law of magnetic attraction is like poles repel and unlike poles attract. Magnetism is an attractive force. When a magnetic object is within the magnetic field (those orange lines), it is attracted or repelled to or away from the magnet. When the north and the south poles on two different magnets come within the magnetic field they come together. When the two north poles or the two south poles come within the magnetic field they push apart. A magnet is an object that attracts or repels certain objects towards or away from it.

Light gets refracted when it passes through a prism, showing that light is made up of ROYGBIV. Additive color mixing is mixing light because each beam of light adds its own colors to the mixture, witch is why light on the screen from the combined beams of light is brighter than the light from the beams by itself. The visible spectrum is only a small part of the electromagnetic spectrum. It is the only part of the electromagnetic spectrum that we can see. Subtractive color mixing is when you shine a light through multiple filters, it subtracts that color from the light, hence the name ‘subtractive color mixing ’ R ed O range Y ellow G reen B lue I ndigo V iolet Prism- A solid transparent object that redirects and separates light rays into its true colors. We see red because when light hits the apple, it absorbs all colors except red, which reflects back into our eyes. It goes the same for all other colored objects and for white, it reflects all colors (ROYGBIV), and for black, it absorbs all colors and reflects none.

The following slides are about lenses and mirrors, and here are some useful facts and pictures to help you answer the questions. Reflect- to bounce back Refract- to bend light The light rays coming out of the convex lens converge and they cross,causing the image to appear upside-down.

What does a mirror do? Makes you look like a dragon Does your makeup Reflects back an image to your eyes

You are correct!!!!!!!! When light rays hit a mirror, they bounce back and go into our eyes.

What is convex? An object that curves in A flat object An object that bulges out

You are correct!!!!!! A convex mirror diverges light and convex lenses converge light. Concave- an object that curves in Diverge- to spread apart. Converge- to come together

If I shine a light at a 3O degree angle at a mirror, what angle will the light come out at? 80 degrees 30 degrees 10 degrees

You are correct!!!!! The law of reflection states that the angle of light coming into a mirror is the same angle it comes out.

We hear sound because a vibration reaches an eardrum. The eardrum begins to move as the air vibrations hit it. Vibration- a rapid movement back and forth. Sound energy- is sound produced by vibrating objects. Sound waves – a sound wave carries energy from one place to another. Frequency is how high or low the sound is. The waves on the top of the picture are a high-pitched sound because the waves are very close together, unlike the bottom one, which is a lower sound. Volume is how loud or soft the sound is. the volume is determined by how high or low the sound waves go. In this picture, both sound waves are equally high, but they have different frequency (see other side) NERVE EARDRUM ANVIL COCHLEA HAMMER STIRRUP BONES

Technology- any man-made item created to solve a problem Engineering- a way to use math and science in creative ways to solve a problem The engineering design process STEP 1- Ask questions STEP 2- Imagine solutions STEP 4- Create your solution STEP 5- Improve your design STEP 3- Plan your solutions