# 44 – USING WAVES by alice1311

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```									      4.4 – USING WAVES
Scheme of Work (2005)
Y10 Physics
Lesson Learning Objectives                                   Content                                References          Homework ideas                    Risks
1     Remember the order of            Starter - Ask students what types of waves they       Co.Ord               Answer Q1 – Q4 on p 97        N/A
types of waves in the          know about, apart from light & sound. See if they     PHYSICS 3:           and Q5 on p 118
E.M. Spectrum.                 can find similarities between them.                   p 96-97              Worksheets available          You could show
   Be aware of some uses,        Discuss the main components of the                                                                       KS4 Waves: EM
dangers & effects for          ELECTROMAGNETIC SPECTRUM & outline                    Physics for GCSE:    Research the use of           Radiation
different types of E.M.        some uses & effects. Emphasise that they all travel   p 155-156            microwaves in ovens           Boardworks slides
waves.                         at the same speed (300,000 km/s), they are all                                                           6 – 28, or Active
transverse and all can travel through a vacuum.                            June 2004 terminal            Waves PowerPoint
   Get students to produce a mnemonic or other way                            exam Q4                       shows (several
to remember waves in order, from smallest to                                                             available on EM
largest (RMIVUXG), for example, “Red Monsters                              June 2002 periodic            waves) OR KS4
In Violet Underpants X-ray Gorillas”!!!                                    exam Q13a-c                   No Messing
   VIDEO – The Electromagnetic Spectrum                                                                     Powerpoints
(Science in Focus, tape EE, or Seeing through                                                            (Waves)
Science, tape DD). Discuss main points covered.                                                          .
   Questions or written work on main types of
electromagnetic waves & basic uses.
   Plenary – Quick quiz on EM waves & examples
(could use traffic lights cards).
2        State some uses,              Starter - Show PowerPoint show by JIR. Discuss        Co.Ord Phys 3:       The ‘Strange Waves in         Should be C3.
dangers and effects for        in detail how we use: MICROWAVES & INFRA-             p 96-97              Wurzburg’ Web Reader          Ensure that
different types of E.M.        RED waves (cooking), X-RAYS (medical images)          Physics for GCSE:    sheet can be used to          students are happy
waves.                         and GAMMA RAYS (in tracers and radiotherapy).         p 155-156            practise Literacy skills &    to volunteer to
   Recognise that there can      DEMO (optional): Demonstrate radiation levels                              to look at Ideas &            make a brief (a
be more than one               from students’ mobile phones by asking 1              See PRI unit         Evidence on X-rays.           minute) phone call
interpretation of data         student to phone another.                             teachers’ guide &    Extension/G+T:                or text message to
leading to a scientific       EXERCISE 1(Independent Learning Activity):            worksheets.          Students could monitor        another member
controversy.                   Use the PRI unit Mobile Phones in small groups to                          radiation levels near their   of the group. Use
   Be able to contribute to       look at the evidence & draw conclusions. See          See JIR PowerPoint   homes by borrowing the        radiation level
a group discussion of          teachers’ guide sheet for additional information.     show: Cooking with   meter and pool results as a   meter to show
ideas (Independent            Plenary – Group discussion about results of the       IR & Microwaves      project.                      levels detected.
Learning Activity).            exercises above (may take longer).                    & KS4 No Messing                                   You may need to
Powerpoints                                        book the computer
(Waves).                                           room or laptops.
Lesson Learning Objectives                                     Content                                 References         Homework ideas                    Risks
3     Be able to explain how             Discuss how X-ray machines & photographs work,         Web Reader:         Finish producing leaflet
X-rays and Gamma rays           and use PowerPoint show to look at history of X-       p50-53              (this would be a good
are used in medicine.           rays. Mention safety precautions.                      Extension/G+T:      opportunity to use Literacy
from Sun can cause              and as a tracer. Use volunteers to role-play how it    Science:            & presentation).
sunburn & skin cancer.          works on a patient.                                    P 52-56 (X-rays:
   Explain that darker skin       EXERCISE: Students can produce a leaflet (in           Promises &
absorbs more UV and             groups) to explain problems of UV radiation &          Threats)
causes less to reach            how it damages the skin (use laptops & library).
deeper into body and           Plenary – Quick True or False quiz on EM waves.
cause cancer.
4         State the conditions           Starter - Show students a fibre-optic lamp and ask     Co.Ord              Worksheet available           Should be C3
needed for Total                them how light seems able to ‘bend’ if it travels in   PHYSICS 3:
Internal Reflection.            straight lines. Discuss their suggestions.             p 90 - 91           Answer Q1- Q3 on p 91         You could show
   Know about its use in          EXPT – Refraction in a semi-circular glass                                                               KS4 Waves:TIR
fibre optics.                   block. Discuss results and point out critical angle.                       Extension/G+T:                Boardworks slides
   Discuss meaning of TOTAL INTERNAL                      Physics for GCSE:   Research into fibre optics    3 – 17 OR KS4
REFLECTION & CRITICAL ANGLE (c).                       p 135-136           & communications.             No Messing
   DEMO – Passage of light through an optical                                 Students could produce an     Powerpoints
fibre. Explain again why this happens.                                     advert or brochure for a      (Waves)
   Briefly discuss uses of T.I.R. – prisms, cats’ eyes,                       new medical endoscope.        Extension work on
fibre optic cables, etc. Students can make notes.                          Explaining how it works.      communications
   Plenary – Explain in 25 words why rays ‘bounce’ .                                                        has WRL links
5         State the conditions           Starter - Recap key ideas about Total Internal         Co.Ord              Answer Q1- Q3 on p 91         N/A
needed for Total                Reflection (quiz, or use an OHP image as prompt).      PHYSICS 3:
Internal Reflection.           Show pupils ray diagrams for devices such as           p 90 - 91                                         You could show
   Know about its use in           binoculars, periscopes and endoscopes.                                                                   KS4 Waves:TIR
fibre optics, binoculars,      Finish notes & questions about fibre optics.                                                             Boardworks slides
periscopes, bicycle            Discuss lenses and their use in cameras.                                                                 3 – 17 OR KS4
reflectors, etc.               Plenary – Show some pictures on cartoons of                                                              No Messing
optical devices and ask students to explain how                                                          Powerpoints
light travels through them.                                                                              (Waves)
6         Distinguish between            Starter - Ask students what we mean by Analogue        Co.Ord              Find out how information      Should be C3.
Analogue and Digital            and Digital signals (sketch diagrams on board).        PHYSICS 3:          is stored on a CD or DVD.
signals, using diagrams.       DEMO: Use CRO or Picoscope to show                     P 98 - 101
   Recognise some of the           difference between ANALOGUE & DIGITAL                                      Extension/G+T task: Ask
advantages and                  signals. Mention that digital signals allow more                           students to research/write
disadvantages of using          data to be transmitted with greater accuracy, but                          about how an analogue
Analogue & Digital              does require Analogue-Digital conversion. Notes.                           sound signal (voice) is
signals.                       List some common Analogue & digital devices.                               sampled & stored in MP3
   VIDEO (optional) – Digital World (extracts)                                format on a computer
(good project).
Lesson Learning Objectives                                    Content                                References           Homework ideas                     Risks
7     Recall some examples              Starter – Ask students to describe some uses of        Co.Ord              Co.Ord PHYSICS 3:              None
of how various EM               EM waves in modern communications (IR remote           PHYSICS 3:          p 99 Q1 – Q6
waves are used for              controls, Microwave radio links, light pulses in       p 98 - 99
communications,                 cable TV and satellite radio broadcasts). List on                          Revise for end of topic test
including microwaves            board.                                                 Worksheets
in narrow beams.               Brainstorm students to produce a flow chart/           available           Extension/G+T:
   Explain simply how              diagram of how satellite communications work:                              Students could find out
ground-satellite radio          Data sent to ground station – transmitted to           OHP sheets in KS4   about AM and FM, and
communications work.            satellite receiver dish – processed and transmitted    folder              produce a guide for Y9
diffraction, reflection         sheets.                                                Use Building        signals.
and refraction will            Mention how diffraction, reflection and refraction     Blocks to show
communications.                 as they are transmitted from a dish, losing some of    animations about    Waves: TV Power Point
the signal. They reflect from the ionosphere for       diffraction.        show.
long-wave communications. They refract from
different density layers of the Earth’s atmosphere).
Students make notes.
   Plenary - Summary of topic (use criteria sheets).
This could be done as a Traffic Lights activity
8-9       Recall that earthquakes        Starter - Ask students in pairs what they think        Co.Ord              Answer questions on p 113      N/A
produce shock waves,            causes earthquakes and how waves produced can          PHYSICS 3:          and p 115.
detected on the surface         travel so quickly (several km/s).                      p 112-115           Worksheet available on         You may need to
of the earth by                Describe P waves (longitudinal) and S waves                                Seismic Waves.                 book the laptop +
seismometers.                   (transverse) and the differences between them (P       Web Reader:         The ‘Earthquake!’ sheet in     projector
   Distinguish between S           waves can travel through the Earth’s core, so they     p 8-9               Web Reader can be used to
and P waves.                    are the fastest).                                                          practise English/literacy      The s-cool.co.uk
   Know that longitudinal         DEMO 1: Seismic Wave program (use laptop &             Reading into        skills and to look at Ideas    website has some
& transverse waves can          projector or network computer room).                   Science:            & Evidence in Science.         good revision
travel through the Earth,      VIDEO – Earthquakes & Seismic waves (Science           P 65-67 (Holey                                     material on
in different ways.              in Focus, tape KK).                                    Earth)              Extension/G+T:                 structure of the
   Realise how these              Describe the internal structure of the Earth & how                         Students could try one of      Earth and S & P
waves provide evidence          we know this from P and S wave data (this is a         You could show      the following:                 waves.
of the structure of the         favourite exam question).                              Active Waves:       (a) Find out how many
Earth, and be able to          DEMO 2: Use Building Blocks to show how S              Earth PowerPoint    earthquakes there are per
explain how                     and P waves travel through Earth & refract.            show, or KS4:       year of each type on the
seismographs are used                                                                  Structure of the    Richter scale.
   Written work on types of seismic waves and the
to find speed of waves.                                                                Earth Boardworks    (b) Research & describe
structure of the Earth (question & research sheet).
slides OR KS4 No    ways to prevent
   Plenary – Summary of PD1 work. Quiz on main
Messing             earthquakes from
ideas (revision ‘Millionaire’ game available)
Powerpoints         damaging tall buildings in
(Waves)             cities.
Lesson Learning Objectives                                    Content                                  References       Homework ideas                    Risks
10    Describe the                      Starter - Discuss students ideas about how features     Co.Ord            Co.Ord PHYSICS 3:            None
composition of the              on the Earth are formed and look briefly at some        PHYSICS 3:        p 117 Q1 – Q5
Earth’s outermost layer         old ideas. NB – Plate tectonics is a recent idea!       p 116-117
in terms of plates in          Establish that Earth’s plates are moving and
relative motion.                explain what happens at boundaries. Mention how         June 2003
   Relate plate tectonic           this leads to formation of various rocks (p117).        periodic exam
processes to the                Students make a page of notes in their books to         Q12c
formation, deformation          explain ‘everything you ever wanted to know
and recycling of rocks.         about plate tectonics’.                                 June 2002
   Interpret information on       EXERC – ICT exercise on plate tectonics (see            periodic exam
the development of              website). Discuss results & conclusions.                Q13d
ideas in plate tectonics.      Plenary – Summary of key ideas on seismic waves
& rocks. Quick quiz.
11-12      Explain the nature of          Starter - Review Y8 work about basic properties of      Co.Ord            Answer question on Q 1 –     Should be C3
Sound & Ultrasound.             SOUND WAVES (longitudinal, vibrations, unable           PHYSICS 3:        Q3 on p 135 and Q1 – Q6
   Recall that Ultrasound          to travel through a vacuum, variation of speed with     p 104-111         p 111                        Ensure that
is sound with a                 density of medium). Students could work in teams                                                       students are sat
frequency over 20,000           to produce a quick summary sheet as a poster &          Web Reader:       Worksheets available on      behind the safety
Hz.                             display to the class (formative assessment task).       p 44-46           Ultrasound & Speed of        screen when using
   Be able to describe            DEMOS (optional) – Bell in evacuated jar,                                 Sound waves                  the vacuum pump.
some common uses of             Slinky spring. Emphasise sound waves are                Reading into
ultrasound.                     longitudinal & need a medium (air) to travel in.        Science:          Extension/G+T:               You could use
   Discuss nature of ULTRASOUND –emphasise                 P 28-30 (Little   Carry out research into      KS4 waves:
that it is sound over 20,000 Hz, so we can’t hear it!   Bleeders)         how Doppler Ultrasound       Sound
   Revise the idea of echo-location using SONAR.                             works for monitoring         Boardworks slides
This is why submarines ‘ping’ in war films when         June 2004         blood flow, etc. Find out    3 – 37 to support
they are hiding from ships using SONAR.                 periodic exam     why pregnant women must      work in the lesson.
   Mention some common uses of Ultrasound, such            Q13c              drink lots of water before
as body scans, destroying kidney stones, sonar,                           having a scan during
cleaning, checking for cracks in pipes ).                                 pregnancy.
   DEMO: Building Blocks animations on
Ultrasound & uses. Students make brief notes.
   Exercise (optional) – Ask students to choose 1 use
of ultrasound and write a page about it for a
scientific magazine. They could do additional
research at home (formative assessment).
   Plenary – Ask each table for 2 Ultrasound ‘facts’
and compile a class list/page.
13        Review work covered in         END OF UNIT TEST – Using Waves.                         N/A               N/A                          N/A
the topic & assess             Review work covered in topic & mark test.
students’ understanding.

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