Engage your Brain, page 269.(True/False)

BE SURE YOU HAVE YOUR TEXTBOOK PAGES AND NOTE PAPER OUT ON YOUR DESK.

BELLRINGER

Waves & Light

Learning Goal:The student will understand different

types of waves and be able to compare and contrast different types of waves.

9/19/2013Students will be able to describe a wave and identify parts of the wave.

Daily Learning Target

What are waves?

What are waves?p. 270-271

• disturbances that transfer energy from one place to another.– They do NOT transfer matter.

• Some waves require a medium to travel.– A medium is the material a

wave travels through• For example: water, rock, air, a

rope, a table

Waves are Disturbances

Waves transfer energy not matter. The water waves below are carrying energy but are not moving. Waves can only exist as they have energy to carry.

Page 270: Underline the names for the highest and lowest points on a wave.

Page 270: Looking at the picture at the bottom of the page, draw an arrow showing the direction you think the wave energy is traveling.

What sentence on that page supports your choice? Put brackets around the sentence. < >

IN YOUR BOOK

Labeling a wave

Page 271: The four pictures on the page will show the passage of time for a leaf floating on the water. PREDICT…

Illustrate: In the space provided, draw the leaf in the location it will be after two seconds.

Model: In the space provided, draw the leaf and wave as they will appear after 3 seconds.

IN YOUR BOOK

WRITE OUT THE QUESTION, THEN ANSWER. What are waves? Do waves transfer matter? What do many waves require in order to

travel? What do we call the highest point on a wave? What do we call the lowest point on a wave?

Bellringer – 5 minutes

Waves & Light

Learning Goal:The student will understand different

types of waves and be able to compare and contrast different types of waves.

9/19/2013Students will be able to explain how a wave transfers energy.

Daily Learning Target

How does a wave transfer energy?

Two Ways to Transfer Energyp. 272-273

LONGITUDINAL TRANSVERSE• Energy travels in

the direction the wave travels

• Does not transfer matter

• Has compressions and rarefactions

• Particles move back and forth in the same direction as the wave (parallel to the wave)

• Travel faster than transverse waves

• Example: Sound waves

• Energy travels in the direction the wave travels

• Does not transfer matter

• Has crests and troughs

• Particles move perpendicularly to the direction of the wave

• Travel slower than longitudinal waves

• Example: Earthquake’s S-Waves.

Transverse Waves

In a transverse wave the matter in the wave moves up and down at a right angle to the direction of the

wave

KEYWORD: PERPENDICULAR

Parts of a Transverse Wave

Longitudinal Waves

In a longitudinal wave the matter in the wave moves back and forth parallel to the direction of the wave

KEYWORD: PARALLEL

Parts of a Longitudinal Wave

Create a Double Bubble Map COMPARING AND CONTRASTING longitudinal waves and transverse waves (use the T-chart in your notes).

Bellringer

Page 272: Looking at the picture at the bottom of the page, (1) label the arrow that shows the direction the wave travels and (2) label the arrow that shows how the spring is disturbed.

Page 273: Looking at the picture at the bottom of the page, (1) label the arrow that shows the direction the wave travels and (2) label the arrow that shows how the spring is disturbed.

IN YOUR BOOK

EXAMPLES OF COMBINED WAVES

EXAMPLES OF COMBINED WAVES

What are two ways in which longitudinal and transverse waves are similar and two ways in which they are different. (TURN IN)

HOMEWORK: Summarize today’s notes, 5-10 minute review of chapter notes, read p. 274, study vocab (Quizlet).

CHECK FOR UNDERSTANDING

September 24, 2013

Name some of the types of electromagnetic waves that travel from the sun to the earth.

Bellringer

What are two types of waves?

Two Types of Wavesp. 274

Mechanical Waves Electromagnetic Waves• Require a medium

• Can be either longitudinal or transverse.

• Travel at different speeds in different media.

• Sound travels fastest through a solid and the slowest through air (the denser the material, the faster sound)

• Do NOT require a medium

• Transverse• Travels in a vacuum

(like outer space) at 300,000,000 m/s, but slower in solids, liquids & gas.

• Example:• Sunlight travels

through space to get to earth as radiation in the form of visible light, ultraviolet, and infrared.

Complete pages 275-277 in your textbook.

If you do not have your textbook pages with you, partner up and write out all questions and answers.

What are the three ways in which energy from the sun travels to the earth? (TURN IN)

HOMEWORK: Summarize today’s notes, 5-10 minute review of chapter notes, READ p. 284, study vocab.

CHECK FOR UNDERSTANDING

September 25, 2013

1. What are the two types of waves?

2. The sun travels to the earth as an electromagnetic wave. What are the 3 forms of EM waves that travel from the sun to the earth?

Bellringer

Waves & Light

Learning Goal:The student will understand different

types of waves and be able to compare and contrast different types of waves.

9/25/2013

Describe and/or explain that waves move at different speeds through different materials.

Daily Learning Target

Is wave speed the same for both types of waves?

Speed of Wavesp. 284

Mechanical Waves Electromagnetic Waves• Travels fastest in a

vacuum• 300,000,000 m/s• 300,000 km/s• 186,000 mi/s

• Travels much slower in a medium (solid, liquid, or a gas)

• Requires a medium (solid, liquid, or gas to travel)

• Does not travel in a vacuum.

• Order of speed (fast to slow):

• Solid (depends on density)

• Liquid• Gas (depends on

temperature)

Which travels slower, mechanical waves or electromagnetic waves? Support your answer. For example:

____________________ waves travel slower because ______________________________________.

Bellringer

Waves & Light

Learning Goal:The student will understand different

types of waves and be able to compare and contrast different types of waves.

9/26/2013-9/27/2013

Daily Learning Target