This power point is about Waves. It can be used for higher ks4. It covers the electromagnetic spectrum , transverse and longitudinal waves.It is very helpful for students and includes many tasks, quizzes and a plenary at the end. Enjoy and please leave comments!

1. By the end of the lesson you should be able to know...
 Longitudinal & Transverse Waves
 the properties of the electromagnetic spectrum

2. What type of waves do you know?
Think of all the different types of waves you know and write them down. You have 2 minutes!
Ocean wave
X Ray Wave
Ultra violet
Microwave
Sound Wave
Gamma
Radio wave
Light wave
Friendly wave!
Mexican Wave
Infrared
There are many
different types
of waves...did
you think of any
more?

3. What is the electromagnetic spectrum?
The electromagnetic spectrum covers
all types of electromagnetic
radiation.
The squiggly line next to it is what
the waves look like. It goes from
radio to visible light, which are not
a great danger for humans, to X
ray which can be very dangerous if
you spend to long around it.

4. These waves are in the electromagnetic spectrum.
•
•
•
•
•
•
•
Radio Waves
Microwaves
Infra – Red
Light
Ultra Violet (UV)
X Rays
Gamma rays
You must
remember the
order of the
electromagnetic
spectrum because
it goes from low
energy to high
energy.
ELECTROMAGNETIC SPECTRUM

5. low energy
high energy

6. Copy the diagram on the
right, including
illustrations!

7. What are the uses of the waves in the electromagnetic
spectrum?
Radio Waves: Carrying information, Bluetooth, wireless, TV, radio
, control signals, remote control, navigation , radar , GPS, studying
the universe.
Microwaves: Communication , Cooking
Infra – Red: You can see the temperature of objects, night vision
goggles, TV remote
Light: We can see things
Ultra Violet (UV): Sun beds (tanning) , pubs and clubs may use UV
light to check for fake money, nails.
X Rays : We can see through the body to look at bones ; useful for
hospitals.
Gamma rays: Radiotherapy ; kills cancer cells.

9. Quick Quiz!
1. What is the electromagnetic spectrum?
2. Name one of the dangerous types in the EMS.
3. What comes third on the electromagnetic spectrum?
What score did
you get? Write it
down:
/3

10. It will be handy to do some revision as
homework to remember what order the
electromagnetic spectrum goes in and
what it is.

11. Waves
Waves can be described by amplitude , frequency and wavelength.
Wavelength – The distance between a point on one wave and the same point of
the next wave.
(Horizontal)
Amplitude – Maximum disturbance from its undisturbed position.
Frequency – The number of waves produced each second. The frequency of a
wave is measured in hertz. (HZ)

12. Oscillation - Vibrations

13. Quick Quiz!
1.
2.
3.
4.
What is the correct name for the height of the wave?
What is the correct name for the length of one wave crest to another?
What measurement do we use to measure frequency?
What is the correct definition for frequency ?
What score did
you get? Write it
down:
/4

14. Longitudinal
and
Transverse

15. Different types of waves...
Transverse
•
•
•
TO DEMONSTRATE TRANSVERSE WAVES , YOU CAN MAKE WAVES USING A ROPE
The vibrations are at right angles to the direction of travel
Light and other types of electromagnetic radiation are transverse.
Water waves are also transverse waves.
Longitudinal Waves
TO DEMONSTRATE LONGITUDINAL WAVES, YOU CAN USE A ‘SLINKY’ OR SPRING TO
SHOW COMPRESSIONS
•
•
Vibrations are along the same direction as the direction of energy and travel
transfer.
They show area of compression.

16. See for yourself...
http://www.youtube.com/watch?v=8ezODIKc1ck
Knowing the definitions of a longitudinal and transverse wave is very important.

17. Quick Quiz!
1.
2.
3.
Some waves are longitudinal. What are the oscillations?
Describe a longitudinal wave...
Describe a transverse wave...
What score did
you get? Write it
down:
/3

18. Homework:
 Revise the topics we have covered this lesson:
Waves – Longitudinal & Transverse
Electromagnetic spectrum – What is it?
Learn the order...
Use
www.bbc.co.uk/schools/gcse/bi
tesize to help!
Re
f o
y o
n e
p h
l e
v
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x
y
s
i s e
r
t
s i c s
s o n !

19. Ho w d i d y o u f i n d
t o d a y 's l e s s o n ?
I di d not unde r s t a nd
t o d a y 's l e s s o n a t
a l l !
I
t
c
a
I
u n d e r s t o o d s o me o f
h e t o p i c s we
ov e r e d, but t he r e
r e s t i l l s o me p a r t s
ne e d t o go ov e r .
I f ul l y unde r s t ood
wh a t we d o n e t o d a y
a nd f ound i t e a s y .