Unit 6 – Intro To Waves

NOTE: This slide is for the purpose of including LP information that you may not necessarily show your scholars (if you

include the information below in a different part of your PPT, there is no need to put it here. If you do not show it

anywhere though, include it here in the notes section.

Differentiation:

TEKS

See in slides

ELPS:

1C. Use visual strategies to organize information to solve problems.

Statement of Inquiry:

See in slides

Learner Profile:

Thinker –Scholars will use strategies such as drawing models to solve problems.

SPED

Vocabulary – flash cards

Outlines/Notes – MJ, CS

Highlighting

Marking Texts

Diagrams, maps, graphs

Peer tutoring

Extended time – MJ, CS, AP, RC

Shortened assignments

LEP/ESL

Grouping

Journal Notebooks

Internet Project

Portfolios

Manipulative

Highlighting

Marking Texts

Diagrams, maps, graphs

504

Vocabulary – flash cards

Outlines

Highlighting

Marking Texts

Diagrams, maps, graphs

Peer tutoring

Extended time - CA

Shortened assignments

(Other)_______________

GT

Grouping

Journal Notebooks

Peer Tutoring

Process Writing

Discovery Learning

Internet Project

Portfolios

Manipulative

Other_______________

Do Now:1. Walk in silently.

2. Grab a calculator and any papers for today.

3. Silently practice your vocab.

Due Next Class:• Finished Independent Practice

• New Vocab

v = wave speed or velocity (m/s)

λ = wavelength (m)

f = frequency (Hz or 1/s)

Why it matters in LIFE:

Part of being a

functional human

being is being able to

understand what’s

happening in the world

around you!

Why it matters in THIS CLASS: Our Goal = 80%

Mastering today’s lesson (focused

participation, asking questions, etc)

is the first brick that will help us

reach our goal for this unit, and

eventually for the year

By the end of today, IWBAT…Describe and label the parts of, and

calculate the frequency, wavelength,

and wave speed of a transverse wave

TEKS:

(B) investigate and analyze

characteristics of waves, including

velocity, frequency, amplitude, and

wavelength, and calculate using the

relationship between wavespeed,

frequency, and wavelength;

Topic:

Waves Basics

By the end of today, IWBAT…

Describe and label the parts

of, and calculate the

frequency, wavelength, and

wave speed of a transverse

wave

WAVES

Waves transfer energy through matter or space

TRANSVERSE WAVES

Waves move perpendicular to the transfer of energy

Ex:

light, seismic,

water ripples,

radio waves

TRANSVERSE WAVES

Waves move perpendicular to the transfer of energy

LONGITUDINAL WAVES

Waves move parallel to the transfer of energy

Ex:

sound

LONGITUDINAL WAVES

Waves move parallel to the transfer of energy

The crests of

transverse waves

are like the

compressions on a

longitudinal wave.

On a transverse wave, it is measured

from crest to crest or trough to trough

WAVELENGTH, λ

Units (m)

On a longitudinal wave, it is measured

from compression to compression.

WAVELENGTH, λ

Units (m)

PRACTICE

1 minute BY YOURSELF; 1 minute to compare with your partner.

LET’S PRACTICEIdentify the crest, the trough, and one

wavelength.

LET’S PRACTICEIdentify the compression, the

rarefaction, and one wavelength.

LET’S PRACTICE

In the picture,

count how many

wavelengths are

shown on each

wave.

AMPLITUDE, A

Units (m)- how much energy a wave has.

On a transverse wave, it is

measured from crest to normal

On a longitudinal wave, amplitude

is the width of the compression

Amplitude

AMPLITUDE- how much energy a wave has.

FREQUENCY, f

Units (Hz)

Frequency is how many times a wave

goes by in 1 second.

Number of waves/second

Units for frequency = Hertz (Hz) or (1/s)

FREQUENCY

f = 1/T

f = frequency (1/s)

T = Period (s)

WAVELENGTH, FREQUENCY & WAVE

SPEEDThe greater the wavelength, the lower the

frequency!

Large wavelength means low frequency.

Small wavelength means high frequency.

To calculate the speed of a wave, multiply

the wavelength by the frequency.

v = λf

v = wave speed or velocity (m/s)

λ = wavelength (m)

f = frequency (Hz or 1/s)

EXAMPLEA wave has a frequency of 10 Hz and a

wavelength of 1.5 m. What is the wave

speed?

Procedure for IP time:

1) Silent work time

2) Try and solve without notes first!

Hierarchy of who to ask

1) Your brain

2) Your notes

3) Your partner (quiet whisper)

4) Ms. Cowley

INDEPENDENT PRACTICE!

EXIT TICKET (4 MIN)1. Identify the crests, troughs, wavelength, and

amplitude.

2. A wave has a frequency of 16 Hz and a

wavelength of 0.5 m. What is the wave speed?

EXIT TICKET (4 MIN)1. Identify the crests, troughs, wavelength, and

amplitude.

2. A wave has a frequency of 16 Hz and a

wavelength of 0.5 m. What is the wave speed?

8 m/s