Types of Waves

Mrs. B-Z

1. Define Wave

A wave is a disturbance that carries energy though matter or space.

2. The matter through which a wave travels is called a _.

MediumExamples

PondAir Earth

3. Define Mechanical Waves

Waves that require a medium are called mechanical waves

Nearly all waves are mechanical waves except for electromagnetic waves.

4.

The type of wave that consists of changing electric and magnetic fields in space is called electromagnetic waves.

5.

Energy is the ability to exert a force over a certain distance or the ability to do work.

6. What is a tsunami?

Huge ocean wave caused by an underwater earthquake

It is NOT a tidal wave.

Tsunami Flooding

Time = 0

                               

Destructive tsunamis originate primarily in subduction zones around the Pacific Rim.

Not every earthquake generates a tsunami.                                

Model simulations combined with real-time tsunami measurements will help assess the hazard.

                                                                                     

A simulated tsunami generated by a large subduction earthquake (Mw = 8.5) in Alaska-Aleutian Subduction Zone.

                                                                                     

Data network

                           

Deep-oceanAssessment andReporting ofTsunamisSystem

                              

Surface Buoy

and BPR Deployment

                             

Quality Control Web Page

                               

Simulated Tsunami and DART Reporting Modes

                                                 

Computer Models allow scientists to figure out where tsunamis are most likely to

strike and that is supposed to help officials find ways to put evacuation plans in place.

What went wrong on Dec. 26, 2004 when 216,000

people died?

Warning system was not in place for the Indian Ocean as it is for the Pacific Ocean

Evacuation routes were not marked

7. Why do speakers need to amplify sound?

Although each wave has the same energy, but as the waves get spread out over a larger area, the energy also gets spread out over a larger area.

8. Most waves are caused by

Vibrations of matterEven EM waves which do not require a

medium are caused by the vibrating of charged particles

9.

Both swinging pendulums and springs bobbing back and forth are examples of how vibrations transform energy.

10. What is simple harmonic motion in a spring?

When a spring is expanded or compressed, it is exerting a force that pushes the mass back almost to the original resting position. As a result, the mass will continue to bounce up and down which is an example of simple harmonic motion.

11.

A vibration that fades out as energy is transferred from one object to another is called damped harmonic motion. An example of this is when springs are attached to both a block of wood and each other. You can see a different motion than when there is just the expansion and contraction of the spring.

12. List the two ways that a wave can move.

Back and forth (horizontally)Up and down (vertically)

13 -15.

13. Waves in which the particle is perpendicular to the motion of the wave as a whole are called transverse waves

14. Wave of people in a stadium15. Draw a picture of a Figure 6 on page

460.

16-18

#16-18

16. Waves that cause the medium to vibrate parallel to the direction of the wave motion are called longitudinal waves.

17. Examples: spring moved horizontally18. Particle motion

Wave motion

19.

Water waves are examples of surface waves.

20.

This type of wave occurs on the boundary between two different mediums.

21.

The particles in surface waves move both perpendicularly and parallel.

*