6 th grade Mrs Messina DO NOW 22316 T hink about the term electromagnetic List as many things that you can think of that are considered electromagnetic Electromagnetic energy ID: 734576
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Slide1
ELECTROMAGNETIC SPECTRUM
6th grade Mrs. MessinaSlide2
DO NOW
: 2/23/16Think about the term “electromagnetic”.
List as many things
that you can think of that are considered electromagnetic.Slide3
Electromagnetic energy
: ELECTRICITY / MAGNETISM
a
form of energy that is
emitted from objects in the form of electrical and magnetic waves that can travel through
space
Slide4
SWBAT:
Students will be able to compare and contrast the different forms of waves located on the Electromagnetic Spectrum.
Objective Goals
:
a) Do Nowb) Analyze informative text
c) Engage in the group activity
d) ReflectionSlide5
Read and HighlightRead over the questions.
Read the passage:
The Electromagnetic Spectrum
Place and box around the bold-faced vocabulary terms and underline the important key concepts that answer the questions above.
Answer the questions. Slide6
Light is a form of energy. Sometimes light behaves as if it is made up of tiny particles of energy called photons. Unless disturbed, photons travel in straight lines. Other times, light behaves as an electromagnetic wave. Electromagnetic waves have some electrical properties and some magnetic properties. These waves are made up of transverse waves that vibrate at right angles to each other.
Transverse waves
are waves in which particles move up and down at right angles to the direction of the wave motion.
The
Electromagnetic Spectrum
Light that you can see is called
visible light,
or white light. Visible light waves make up a small part of a much larger band of waves called
electromagnetic spectrum.
The electromagnetic spectrum displays different types of waves. Long waves are located on the left side of the spectrum while shorter waves are located on the right side of the
spectrum.
Radio
waves
have the longest wavelength and the lowest frequency.
Frequency
is the number of complete waves passing a point in a given time.
They are used for radio, television, and radar signals.
Microwaves
are used for wireless communications and microwaves ovens.
Infrared Rays
are given off by all objects. You cannot see infrared rays, but you can feel them as heat.
Visible light
is known as white light.
Ultraviolet Rays
can cause sunburn. Ultraviolet light is used to kill bacteria.
X-rays
have a very short wavelength and a high frequency. X-rays are used in medicine to form images of bones and internal organs.
Gamma rays
have the shortest wavelength and the highest frequency. They are given off during nuclear reactions.
Slide7
ELECTROMAGNETIC ENERGY
is a form of energy that is emitted from objects in the form of electrical and magnetic waves that can travel through space.Slide8
Examples of Electromagnetic Energy
:Radio waves, microwaves, Infrared waves, Light waves, Ultraviolet Waves, X-rays, Gamma raysSlide9
The
electromagnetic spectrum displays different types of waves. Long waves are located on the left side of the spectrum while shorter waves are located on the right side
of the spectrum.Slide10
Turn & Talk
On the last page of your packet there is a chart of waves. Cut out each section on the chart and place them in a pile next to you.
Read each one and prepare to participate in a class discussion about each wave.Slide11
Let’s Review……..Slide12Slide13Slide14
TURN AND TALKObserve the electromagnetic spectrum on your reading passage.
Where are the longest waves? Where are the shortest waves?
Name the longest waves.
Name the shortest waves.Slide15
Electromagnetic Spectrum Matching Activity
On your electromagnetic spectrum, paste the waves in the appropriate location. Also, indicate where the longest waves and shortest waves belong on the spectrum. Slide16
REFLECTION
:1) Complete the exit ticket- Compare and contrast radio waves and gamma waves.
2) Place the waves in order from longest to shortest on the spectrum.Slide17
DO NOW:
2/24/16Compare and contrast radio waves and gamma waves. Make sure to include the terms wavelength and frequency in your comparison explanation. Also, include examples for each.Slide18
SWBAT
: Students will be able to compare and contrast the different forms of waves on the electromagnetic spectrum.Today’s Agenda
(A Day in the Computer Lab)
Do Now
Analyze Informative Text(Website)/Flipbook Activity
Record Data
ReflectionSlide19
Read and HighlightRead over the questions.
Read the passage:
The Electromagnetic Spectrum
Place and box around the bold-faced vocabulary terms and underline the important key concepts that answer the questions above.
Answer the questions. Slide20
Light is a form of energy. Sometimes light behaves as if it is made up of tiny particles of energy called photons. Unless disturbed, photons travel in straight lines. Other times, light behaves as an electromagnetic wave. Electromagnetic waves have some electrical properties and some magnetic properties. These waves are made up of transverse waves that vibrate at right angles to each other.
Transverse waves
are waves in which particles move up and down at right angles to the direction of the wave motion.
The
Electromagnetic Spectrum
Light that you can see is called
visible light,
or white light. Visible light waves make up a small part of a much larger band of waves called
electromagnetic spectrum.
The electromagnetic spectrum displays different types of waves. Long waves are located on the left side of the spectrum while shorter waves are located on the right side of the
spectrum.
Radio
waves
have the longest wavelength and the lowest frequency.
Frequency
is the number of complete waves passing a point in a given time.
They are used for radio, television, and radar signals.
Microwaves
are used for wireless communications and microwaves ovens.
Infrared Rays
are given off by all objects. You cannot see infrared rays, but you can feel them as heat.
Visible light
is known as white light.
Ultraviolet Rays
can cause sunburn. Ultraviolet light is used to kill bacteria.
X-rays
have a very short wavelength and a high frequency. X-rays are used in medicine to form images of bones and internal organs.
Gamma rays
have the shortest wavelength and the highest frequency. They are given off during nuclear reactions.
Slide21
Based on your reading, create an Electromagnetic
S
pectrum flipbook (study tool).Slide22
Please go to the following website analyze informative text:
https://amazing-space.stsci.edu/resources/explorations/light/ems-frames.htmlSlide23
Questions about the Electromagnetic SpectrumWhere are the shortest wavelengths located on the spectrum? __________________________________________________________________________________________________________________________ Name the shortest waves. _____________________________________________________________
Where are the longest wavelengths located on the spectrum? __________________________________________________________________________________________________________________________
Name the longest waves. _____________________________________________________________
Where on the electromagnetic spectrum, between which two waves, is visible light found? ____________________________________________________________
What type of rays would you expect to be used frequently at a hospital to make medical diagnoses? _____________________________________________________________
List the colors of visible light in order. (Hint: the colors of the rainbow)
_________________________________________________________________________________________________________________________
Slide24
Reflection:
Place
the waves in order from
longest
(Weakest)
to
shortest
(Strongest) on the spectrum
.
List one example for each wave.Slide25
DO NOW: 2/26/16Compare and contrast radio waves and gamma waves.
Make sure to include the terms wavelength, energy and frequency in your comparison explanation. Also, include examples for each.Slide26
Radio Waves have the longest wavelength and low frequency.
Gamma Rays have the shortest wavelength and high frequency.
Gamma waves have high energy. Nuclear explosions and stars emit
gamma waves. Radio,
tv
emit radio waves.Slide27
SWBAT
: Students will be able to identify the composition of white light using the method of refraction through a prism.
Today’s Agenda
:
Do Now
Analyze Informative Text
Activity
ReflectionSlide28
Turn and Talk
What do you know about rainbows? Think…How do rainbows form?Slide29
Water
vapor in the atmosphere can break apart light wavelengths creating a rainbow. Slide30
Analyzing Informative Text
1) Read over the questions.
2) Place a box around the bold-faced vocabulary terms and underline the informative facts following each term.
3) Answer the questions.Slide31
Reading and Activity:
Using a Prism to Analyze White LightHave you ever looked at a rainbow and wonder how that happens? Most of us know that it takes a special combination of rain and light before a rainbow appears. Why a rainbow appears is due to the bending of light waves when they pass through water droplets. This process is known as refraction. A fun way to create rainbows without water is by using prisms. Prisms bend light waves and disperse the light into individual colors. Each color has a different wavelength and shows up at a slightly different angle.
White light is composed of all the visible colors in the electromagnetic spectrum, a fact that can be easily proven through the use of a prism. As light passes through a prism, it is bent, or
refracted
, by the angles and plane faces of the prism and each wavelength of light is refracted by a slightly different amount.
Violet
has the highest frequency and is refracted the most.
Red
has the lowest frequency and is refracted the least. Because each color is refracted differently, each bends at a different angle, resulting in a fanning out and separation of white light into the colors of the spectrum.
Water droplets in the air can act in a manner similar to that of a
prism
, separating the colors of sunlight to produce a spectrum known as a rainbow. To be able to see a rainbow, you must be standing with the sun behind you. The sunlight shines into the water droplets in the air, bending as it moves from the air into the water, reflecting off the sides the drops, and bending again as it exits the drops. As a result, all of the colors in the white light of the sun separate into the individual bands of color characteristic of a rainbow.Slide32
Question
: Will you be able to see the components of white light by using a glass prism?Slide33
Hypothesis:
(If… then…because…)If we use a glass prism and directly place in the sunlight, then we _______ (will/will not) be able to see the components of light because ________
________________________________.Slide34
Procedure:
Get materials: White paper, prism, sunlight from classroom windowPlace the prism directly in route of the sunlight beaming into the classroom window.Put the white paper directly under the prism.
Record your observations.
Draw a sketch of your observations.
Answer the questions.Slide35Slide36
Answer the following questions:
Is white light really just white light? Explain. __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ ______________________________________________________________________________
Can white light be broken down into other colors? Explain and list the colors. __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
What instrument can be used to analyze the components of white light? ______________________________________________________________________________
How do you use this instrument? __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Define the term
REFRACTION
. ____________________________________________________________________________________________________________________________________________________________
Which color has the highest frequency? ______________________________________________________________________________
Which color has the lowest frequency? ______________________________________________________________________________
Slide37Slide38Slide39
Reflection:
Think….Is white light really just white light?1) What are the components of white light?
2) What are some ways we can break down white light to see it’s true colors?Slide40
When white light shines through a
glass prism, the white light is broken apart into the colors of the visible light spectrum. Slide41
DO NOW
: 2/26/16Think about a thunderstorm.
What do you experience first, thunder or lightning?
Why do you think this happens? (Use text based evidence to support your answer.)Slide42
SWBAT: 2/26/16
Students will be able to compare and contrast light and sound waves.
Objective Goals:
Analyze text
Class discussion
Activity
ReflectionSlide43
Analyze Informative Text
Read over the questions.
Place a box around the bold-faced vocabulary terms and underline informative facts about each term.
Answer the questions.Slide44
Analyze Informative Text:
LIGHTHow do Light Waves Travel?Light is made up of streams of photons (tiny bundles of energy).
However, light also behaves like a wave. Light is a type of electromagnetic wave. Electromagnetic waves are different from sound waves. Sound is a longitudinal wave. A sound wave needs a medium in which to travel. Sound cannot be heard in a
vacuum
(empty space).
Light waves are different from sound waves in two ways. Light travels in transverse waves. In
transverse waves
, the particles move up and down at right angles to the direction of wave motions. Also, light waves do not need a medium in which to travel. Light can travel through a vacuum.
Properties of Light Waves
Like all waves, light waves have four properties. They are
speed, wavelength, frequency, and amplitude.
The
speed of light
is 300,000 km/s in a vacuum (empty space). The speed of light in a vacuum is the fastest possible speed.
The
wavelength
of light is the distance from the crest of one wave to the crest of the next wave.
The number of light waves that pass by a point each second is called the
frequency.
The
amplitude
is the height of a wave. A bright light has a greater amplitude than a dim light.Slide45
How do waves interact with matter? What do these terms mean?
Waves travel in straight lines until they hit something
Waves
scatter
when they hit particles in the atmosphereReflection – bouncing back
Refraction
- Waves bend when they change medium (water, oil, prism)
Waves go through some materials and not others
-
Opaque, transparent, translucent
Fiber optics
bend light and
carry
informationSlide46
READ AND HIGHLIGHTRead over the questions.Read the passages on Light and Sound.
Place a box around the bold-faced terms and underline the important facts that follow.
Answer the questions.Slide47
Venn Diagram
LIGHT vs. SOUNDSlide48
REFLECTION:
Which travels faster, light or sound?