Updated Klein ISD, 2008

During every waking and sleeping moment of our lives, we are bombarded with of energy.

Updated Klein ISD, 2008 Most energy waves collide with us or pass right through us without any notice on our part. Waves carry energy, but not matter; however, matter can be used to transfer energy.

Updated Klein ISD, 2008 The matter used to transport the wave is a medium. What is the medium? mechanical waves Waves that use matter to transfer energy are mechanical waves.

Updated Klein ISD, 2008 What is the medium?

Updated Klein ISD, 2008 What is the medium?

Updated Klein ISD, 2008 In the 15th century, Leonardo da Vinci observed that while waves move, the medium (water) does not, “like the waves made in a field of grain by the wind, where we see the waves running across the field while the grain remains in place.”

Updated Klein ISD, 2008 Water,sound, and earthquake waves are examples of mechanical waves.

Updated Klein ISD, 2008 Mechanical waves can be classified according to the direction of the motion of matter in relation to the direction of wave motion.

Updated Klein ISD, 2008 Mechanical waves in which matter moves up and down or back and forth at right angles compared to the direction of wave movement are transverse waves. Click here to see transverse waves in action!

Updated Klein ISD, 2008 Mechanical waves in which medium matter moves forward and backward in the same direction the wave travels are longitudinal or compressional waves. Click here to see compressional waves in action!

Updated Klein ISD, 2008 electromagnetic waves Waves that do not require matter to transfer energy are electromagnetic waves. Electromagnetic waves can travel through a medium, but they can also travel in space or through a vacuum.

Updated Klein ISD, 2008 Radio waves, X-rays, microwaves, and visible light waves are examples of electromagnetic waves. They can all travel through empty space and they all travel at the same speed. This speed is sometimes called The Speed of Light.

Updated Klein ISD, 2008 Review the information on waves by filling in the concept map.

Waves do not move or carry Water And Sound Water And Sound Radio X-rays U-V Rays Light Radio X-rays U-V Rays Light energy include examples such as transfer energy through matter called a ________ includes transfer or carry mechanical waves matter can be classified into two categories electromagnetic waves medium solids, liquids, gasses longitudinal or compression waves transverse waves matter forward and backward in the same direction of wave movement matter up and down or back and forth at right angles compared to the direction of wave movement move to transfer do not require include examples such as matter energy are further classified into are a special type of

Updated Klein ISD, 2008 Bibliography Macaulay, David. (1988). How things work. Boston: Houghton Mifflin Company. pp. 186 Resnick, Halliday, Krane. (1992). Physics. 4th Edition, Volume 1. New York: John Wiley & Sons, Inc. pp “What are waves?” (2002). Texas Science. New York: Glenco McGraw-Hill,pp