PHYSICAL SCIENCEFORCES and INTERACTIONS

Bell RingerWelcome back!

Lets dust some of that rust off.

Write or Draw an example of a situation where a wave is:

Being reflected

Being Absorbed

Being transmitted

Objectives For Today:

•By the end of the day you should:

Be able to…Understand and use wave terminologyCreate mathematical representations of wavesGive examples of waves being reflected, absorbed, transmitted

Agenda/Announcements!

•Today we will be brushing the rust off from a long break and to prepare for this week…and next week’s test.

Announcements: 2nd Period will be a new science period!Grades: There are a few of you that really want to think about re-taking portions of your last two tests. 2nd Period is your time to shine.

What are waves?

Turning in Papers

NAMES: Put your names on assignments that you turn in! There were quite a few 90% assignments turned in with NO NAMES on them. It is a shame to get a zero after you’ve done all the hard work! (It also obliterates your grade…)

READ: Read the question, prompt or activity! Many people got less than ideal grades on their ORQ’s because they didn’t compare their answer to the rubric of what I expected to see. Rubrics are what I use to grade! That is why I include them!

Anyone care to pass-back last classes HW? We’ll be checking them as a CLASS. Don’t worry, I graded on completion, not correctness. That is what we’ll be doing as a class.

Review

A sound wave produced by a lightning bolt has a frequency of 36 Hz and a wavelength of 12.0 m. What is the speed of the soundwave?

A) 420 m/sB) 432 m/sC) 452 m/sD) 467 m/s

Review

A sound wave produced by a lightning bolt has a speed of 550 m/s and a wavelength of 12.0 m. What is the frequency of the soundwave?

A) 46 HzB) 42 HzC) 52 HzD) 55 Hz

Review

A sound wave produced by a lightning bolt has a speed of 660 m/s and a frequency of 40 Hz. What is the wavelength of the soundwave?

A) 15.2 mB) 16.5 mC) 12.0 mD) 8.2 m

Review

• AM radio DJ “Turn it up” Wampler decided to modulate the amplitude of the wavelength that his radio station transmitted on. The amplitude of his wavelength went from 2M to 8M.

How much energy was required to change the wavelength? (Consider the relationship between wavelength and wave energy)

Review

• Wavelengths with examples

• Wave vocabulary movement activity on Quizlet

RATLab

• Reflection Absorption Transmission

RATLAB General rules:• Read the station rules at each table before beginning the

activity.

• Almost every station has something that CAN and probably WILL break if mistreated. • If you are careless with my equipment, you are signing yourself

up for my cleanup team. You will not only clean up your mess, you will be cleaning up the room after the lab either during lunch or after school.

• Place materials BACK IN THE BUCKET before you transition!

RATLAB General rules ctd:• I reserve the right to shut down the lab at any time.

• If too many individuals are not following lab safety rules and cannot be safe, we will pack up the lab and go through the notes one by one. This is material that you need to know – you dictate whether the process is in the form of notes or activities

Mayhem and breakage not permitted in RATLab

RATLAB Station 1• I made the sections go by tables. We will rotate

through the sections every 10 minutes.

• Station 1 is the Taleidoscope – Taleidoscopesare kaleidoscopes without the end covered.

• At the station, you will design your own pattern and identify how many different images the mirrors inside produce.

• SAFETY – this is a potential safety hazard, I will not allow unsafe students to be on it. Let this be your warning, there will be no others – DO NOT hang on it.

RATLAB Station 2

• Station 2 is the Kaleidoscope

• You will make your own kaleidoscopes and understand the relation between angles and images formed.

• SAFETY – this is a potential safety hazard, I will not allow unsafe students to participate. The mirrors can break, be careful. If one does, watch out for sharp edges and notify me please!

RATLAB Station 3

• Station 3 is the absorption of light through solids.

• You will be observing how black light absorbs into some objects and reflects off of others.

• One partner will be the “hider” the other will be the “seeker” – feel free to take turns!

RATLAB Station 4

• Station 4 is a wave review station.

• You will be using wave generators to explain wave concepts and build vocabulary.

• You will be expected to draw and label the different types of waves, so if that isn’t in your notes, you might want to get that in there!

RATLAB Station 5

• Station 5 is involves radiometers.

• Radiometers absorb infra-red rays and respond in an interesting way. You will be expected to give possible reasons for that reaction and there will be some reading.

• SAFETY: Radiometers are in glass bubbles. They are fragile. Leave them where they are, you don’t have to touch them!

RATLAB Station 6

• Station 6 involves the transmission of light through a solid, and what affect that has on light.

• You will search for answers as to why these devices have the effect they do, and how prisms can be useful.

Review Day Exit Activity

• Relate at least three things you did over spring break to waves and electromagnetic radiation. Be sure to incorporate at least 5 vocab words from class

• This is AT LEAST 3 short paragraphs

• Possible Vocab words below:

• Transverse wave, compression wave, radio wave, microwave, infrared wave, visible light, ultraviolet, x-ray, gamma, amplitude, frequency, crest, trough

RATLAB Station 7

• Station 7 involves an understanding of how radio waves are created and how they travel.

• You will communicate with your partner in morse code, and compete with other partners that will be using flashlights to transmit light messages.

• The flashlights are being compared to digital signals (definite on and off), the radio waves are being compared to analogsignals (less definite on and off, lots of background noise)