Catch the WaveCatch the Wave

TAKS Objective 4TAKS Objective 4

The student will demonstrate an understanding of motion, forces, and energy.

TEKS 8.7 Science Concepts

TEKS 8.7 Science Concepts

The student knows that there is a relationship between force and motion. The student is expected to:

B. recognize that waves are generated and can travel through different media.

Lesson ObjectivesLesson Objectives

• The learner will be able to differentiate between the motion of the wave and the motion of the matter carrying the wave.

• The learner will identify waves that require a medium to move through and waves that travel through empty space.

• The learner will demonstrate that waves carry energy.

Lesson ObjectivesLesson Objectives

• Students will generate waves that pass through different media.

• The student will demonstrate that a wave moves forward while the material through which it passes is displace only slightly and momentarily.

• Students will measure wave properties.

What students will studyWhat students will study

• Mechanical waves which require a medium– Longitudinal waves like sound– Transitional waves like ocean waves

What students will studyWhat students will study

• Electromagnetic waves travel though space– Radiation from the Sun produces heat on

Earth– Radio waves are captured by a receiver and

transformed into mechanical waves

–L-o-n-g-i-t-u-d-i-n-a-l

Mechanical WavesMechanical Waves

Are caused by the

Compressionand

R a r e f a c t I o nOf the molecules in the medium through which the wave is traveling. An example is:

Sound WavesSound Waves

Another mechanical waveAnother mechanical wave

Is the transverse wave. The wave travels and the medium moves from side to side.

– T~r~a~n~s~v~e~r~s~e

Waves that travels through space are called

Waves that travels through space are called

Electromagnetic Waves

Electromagnetic Waves

• radio

• light

• heat radiation

• microwaves

• X-rays

SummarySummary• Waves carry energy from one place to another

without the medium moving nearly as far.

• Amplitude is the size of a wave.

• Wavelength is the distance from one point a wave to a corresponding point on the next cycle.

• Period is the time it takes to make one oscillation.

• Frequency is how many times in a second a wave wiggles.

Summary ContinuedSummary Continued• There are many kinds of waves.• Mechanical waves are a form of motion in which

one part of the object moves relative to another, rather than an overall motion of the object from one place to another.

• All mechanical waves need a material medium to shake.

• Mechanical waves can be transverse or longitudinal.

• The speed of a mechanical wave is determined by how stiff and how dense is the medium.

Summary ContinuedSummary Continued• Radio, light, heat radiation,

microwaves and X-rays are all electromagnetic waves that do not require any medium other than space.

• Seismic waves are of two types:–Longitudinal P waves –Transverse S-waves

Chapter ActivitiesChapter Activities

Are designed to provide a variety of experiences with waves. Students will generate and study waves traveling through many different types of medium including:

Air

Dominoes

String

Rubber

And Jello

Now let’s take a look at Chapter Four.

Now let’s take a look at Chapter Four.