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

7. 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.

8. 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.

9. What is the medium?

11. 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.”

12. Water,sound, and earthquake waves are examples of mechanical waves.

13. Mechanical waves can be classified according to the direction of the motion of matter in relation to the direction of wave motion.

14. Mechanical waves in which matter moves at right angles compared to the direction of wave movement are transverse waves. Click here to see transverse waves in action!

15. Types of Mechanical Waves Transverse: –A wave that causes the medium to vibrate at right angles to the direction of the wave

16. 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!

17. Longitudinal Vibrates parallel to (in the same direction of) wave travel –sound waves

19. 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.

20. 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.

21. Review the information on waves by filling in the concept map.

22. do not move or carry include examples such as transfer energy through matter called a ________ includes transfer or carry can be classified into two categories move to transfer do not require include examples such as are further classified into are a special type of