1. The Atmosphere
Reminder…. some things you have pondered….
What is the atmosphere?
What are a few things you already know about the atmosphere?
What is one question you have about the atmosphere?

2. Watched: Earth The Power Of The Planet – Atmosphere
Answered the following questions as you watch or after the film is done.
What are three things you found interesting in the film?
What are two things that surprised you?
What is one question you had from the film?
What are some things about the atmosphere that you wish you knew more about?

3. Agenda:
Intro to electromagnetic radiation
HW: Atmo 2 Practice 1

4. SKIP-PIDY DO-DA

5. SKIP-PIDY DO-DA

6. the Sun From where does Earth get most of its energy? ___________
what’s in between? not much… link
until you get to our atmosphere….
the interactions between atmosphere and energy from the Sun
are key to environment/CLIMATE on Earth
Sun diameter - 864,948.7 mi
Earth diameter – 7917 miles
atmosphere is about
80 miles “thick”

7. the Sun so,…. light is energy 1st …. understand energy from Sun
From where does the earth get most of its energy? ___________
That energy reaches us in the form of?
the Sun
not heat (transfer of thermal energy)
for heat to happen – matter has to touch
Earth is tooooooo far away from the Sun
for thermal energy to “get” to us
there’s “nothing” (at least not much)
in between
so,…. light is energy

8. Light is energy….
synonym for light is Electromagnetic Radiation
radiation
electromagnetic (e/m)
_____________________________
another force you are familiar with ____________
there are Four Forces….
a force
gravity

10. Light is energy….
synonym for light is Electromagnetic Radiation
radiation
electromagnetic (e/m)
where is radiation ? ( )
in space
not in matter
 originates in matter – travels through space
 e/m in origin
radiation is produced as charged particles
move relative to each other
types of e/m radiation
radiowaves, microwaves, infrared, visible, ultraviolet, X-ray, gamma ray
solar energy - primarily infrared (IR), visible, ultraviolet (UV) radiation

11. Light is energy….
synonym for light is Electromagnetic Radiation
radiation
electromagnetic (e/m)
where is radiation ? ( )
in space
not in matter
 originates in matter – travels through space
 e/m in origin
it takes 610-9 sec
for the light to get to
your eyes from
the overhead lights
radiation is produced as charged particles
move relative to each other
travels through space as if it is a wave
but it’s not a wave….
it travels straight…
at what speed? _____________________
2,998,000 meters/sec
186,000 miles/sec
the speed of light
Earth’s circumference 24,901 miles

12. To help understand the nature of light energy….
look at the nature of waves…

13. Amplitude Wavelength Frequency How high are the peaks ?
How far between the two hands?
How many peaks?
How far between two peaks?
How far between two troughs?
How long does it take for 20 peaks to occur?
How long for 1 (one) peak to occur ?
So, 1 (one) peak occurs every
Wavelength
Frequency

14. The type of wave you created is called a ___________________________
The wave goes “up” and “down” between points that are fixed.
Examples….. ___________________________________________
A second type of wave is called a _________________________________
The wave is created and moves through space.
Examples…____________________________________________
standing wave
strings of stringed instruments, the drum skin
traveling wave
sound waves, seismic waves, water waves
standing traveling

15. standing traveling

16. example(s): standing/traveling what varies?
plucked string
standing
height of string

17. example(s): standing/traveling what varies?
plucked / hammered string
standing
height of string
flicked spring
traveling
height of spring

18. example(s): standing/traveling what varies?
water wave w/
dropped pebble
traveling
height of water

19. example(s): standing/traveling what varies?
water wave w/
dropped pebble
traveling
height of water
struck drum
standing
height of drum skin

20. example(s): standing/traveling what varies?
sound wave
traveling
air pressure

21. example(s): standing/traveling what varies?
sound wave
traveling
air pressure
earthquake
(seismic wave)
traveling
compression of land
seismic wave

22. A 
Name
Definition
Symbol
height of a wave (from resting point)
(measured in m, cm, …)
Amplitude A
distance between peaks or b/w troughs
(measured in m, cm, mm, nm…) 
(“lambda”)
Wavelength
how often a peak occurs at a point
(measured in peaks/sec or just 1/sec or Hz)
f or 
(“nu”)
Frequency

23. standing traveling
Name
Definition
Symbol
height of a wave
(measured in m, cm, …)
Amplitude A
distance between peaks or b/w troughs
(measured in m, cm, mm, nm…) 
(“lambda”)
Wavelength
how often a peak occurs at a point
(measured in peaks/sec or just 1/sec or Hz)
f or 
(“nu”)
Frequency

24. A 
Name
Definition
Symbol
height of a wave
(measured in m, cm, …)
Amplitude A
distance between peaks or b/w troughs
(measured in m, cm, mm, nm…) 
(“lambda”)
Wavelength
how often a peak occurs at a point
(measured in peaks/sec or just 1/sec or Hz)
f or 
(“nu”)
Frequency
distance a wave travels in a given unit of time
(measured in meters/sec) v
(or c for light)
Speed
traveling wave only…

25. high energy = ______________, __________________ high frequency
Complete the rope activity again, but this time do the following.
Check with your teacher when you think you got it.
Make a wave with a high frequency. f. Make a wave with a short wavelength.
Make a wave with a low frequency. e. Make a wave with a long wavelength.
Answer the following questions in regards to part 2 of this activity.
1. Which took more energy to create, a high frequency or low frequency wave?
2. Which too more energy to create, a short or long wavelength wave?
3. Can you think of any type of electromagnetic radiation that you have heard of?
Do you think this radiation has a high or low amount of energy?
high energy = ______________, __________________
high frequency
short wavelength

26. YouTube Link – The Scale of Things
high
energy
low
energy

27. low
energy
high
energy
cause
molecules
to rotate
(tumble)
ionize
atoms &
molecules
 cancers
move
electrons
between
orbitals
enough
energy
to….
cause
molecules
to vibrate
break
chemical
bonds
chemical changes
annihilation
skip

28. back
Visible e/m radiation

29. back
UV e/m radiation

30. back
x-ray e/m radiation

31. back
gamma e/m radiation

32. back
infrared e/m radiation
IR images

33. microwave e/m radiation
back
microwave e/m radiation
depends on polarity of molecule…
                      

34. back
radiowave e/m radiation

35. electromagnetic radiation through Earth’s atmosphere
penetration of
electromagnetic radiation
through Earth’s atmosphere