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Eric
squires,
Mrs. Zeek
Earth Science E-core Per. 3
Amazing Space -Web Based Activities
http:/
/ amazin 2-S oace.stsci.ed
u/ reso urces/ exolo rations/
. . Click
on Star Light - Star Bright. Then click on the first
tab "Catch the Waves". 1. "Activate" the prism. - What
happens?
Light
goes through the prism and shows the different colors of light.
2. Read the page. Click on the green word
"spectrum". Define Spectrum: The spectrum is the entire range of all
the various kinds of radiation.
3. Click on the button "Light Facts". Who was the
first person to observe the visible li2ht spectrum?
Isaac Newton was the first person to observe the visible
light spectrum.
4. The word 'spectrum' comes from the
Latin word ghost.
5. Why does sunlight going through a prism come out like a
rainbow?
It does this because prisms separate light by bending light and slowing it down. Light goes through one side and is bent and slowed down so you can see the different color colors through the other side.
6. Blue wavelengths are shorter than red Wayeteor -
7. How fast do all wavelengths of light travel at? They all
travel at 186,000 miles a second.
8. As light passes through a prism,
differences in ~ cause each wavelength to ~ a little differently.
Click "OK"
9. Up at the top of the "Catch the Waves" page,
click on "Brain Teasers". Restate the 3 questions and give a short
answer.
a)
Light travels at 186,000 miles per second. The Sun is so far away from us that
it takes the light leaving its surface 8 minutes to reach Earth. If the Sun
suddenly blew up, would we know about it right away? Why?
It would take Earth 8 minutes to find out because that's how
fast the light takes to travel to Earth
b) Sirius, a star in the constellation Canis
Major, is the brightest star in the sky. It is about 50,000,000,000,000 miles
away. Light travels 186,000 miles per second. How long does it take light
from Sirius to reach Earth? It takes about
8.5 years.
c) A rainbow in the sky is a spectrum. To unscramble
Sunlight into a spectrum, you need a prism. What acts as a prism in the air
that makes a rainbow? Water acts as a prism.
Click "OK"
Then, Click the Next button at the top of the
"Catch the Waves" page. Read about Waves. View the different tmes of waves.
10.
What are the 3 types of waves illustrated?
There
are water waves, sound waves, and light waves.
Click on "Light Facts": Read the "Light
Facts".
11. Is there sound in space? No there is no sound in space.
12. Why or Why Not?
There
is no sound in space because in space there is no matter for sound to travel
though.
. Click "OK"
Click on the Next button.
Click on each type of Electromagnetic Radiation.
13. Define each type (how long is the wavelength) and
2ive an example of each.
a) radio: Radio waves are waves
which are invisible to people and can range from a few
centimeters long to more than six
hundred yards long. Radio waves can be used to transmit to radios which play
music.
b) microwave: A microwave is a
small wave that is about a few centimeters in length and is invisible to the
human eye. Microwaves are used in microwaves to cook food.
c) infrared: These waves are only a
few micrometers in length and are used in things such as TV's.
d) visible: These waves are visible
by people and range from 0.35 micrometer to 0.9 micrometer. These waves can be
seen in a rainbow.
e) ultraviolet: This is a harmful
type of wave which our ozone layer protects us mostly. These waves can give
people a sunburn.
t) X-ray: X-rays are very energetic light waves that are
produced in space, usually by black holes.
These waves do not get through the atmosphere.
g) gamma ray: These are the most
energetic wavelengths of light, and also have the shortest wavelengths. There
is not much known about these waves but that they are produced in space.
Click on "Light Facts".
14. Are your eyes sensitive to most forms of electromagnetic
radiation? No eyes are not sensitive to most
forms of electromagnetic radiation.
15. What kind of 'instrument do you use to detect
radio waves?
Radio
wave translators are used to detect radio waves like in a household
radio.
Click OK
Click
on "Brain Teasers"
16. Read and answer the question.
When
bones are xrayed you see the shadow of the bones not
the bones themselves.
Click on the "Next Button".
Click on each picture of our Sun at different
wavelengths.
17. Sun in Radio Light: What kind of telescope was
used to take a picture of the sun? . The image was taken by
the NRAO 12 Meter Telescope at
18. Where was the telescope located? It was located in
19. Click on the sun as seen in the Infrared. This image of
the sun was taken at a wavelength of near 1
micrometers.
20. Click on the Visible spectrum.
Why are astronomers interested in this wavelength of light? Astronomers
are interested in the wavelength of light because when hydrogen atoms change
energy levels, they put out radiation at this wavelength.
21. The gas spilling out on the right of the
photograph is due to ? It is due to an
explosion on the sun.
22. This image was taken from what satellite? This image was
taken by Skylab.
23. Click on the image of the sun taken in mtraviolet light. Do our eyes see these wavelengths? Our
eyes do not see these wavelengths.
!
24. This image was taken from the satellite called ?
This
image was taken by the Solar and Heliospheric
Observatory (SOHO).
25. When was the telescope launched?
The
telescope was launched
Click on the "brain teasers". Read each question.
Restate each question and provide a short
answer.
a)
What differences and similarities do you see when you compare the images of the
Sun at
different wavelengths? Why do you
think this is so?
The
sun is portrayed in different ways because it is seen at different wavelengths.
Each of these pictures show the sun that looks like a ball, but each picture
looks different.
b) Just like the invisible light waves that we cannot see
with our eyes, are there sound waves that our ears don't hear?
Yes
there are, for example dog whistles can be heard by dogs but not people.
Click on Light Facts: Read. Click ~
Click on "About these Activities: What do you Know?" Read.
Then click on: "Beats Me You Explain It".
Review the questions and answers - you may be Quizzed on this material at a later date!
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