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Electromagnetic Spectrum and Space
ObjectivesIdentify different wavelengths on the
electromagnetic spectrum.Discuss electromagnetic waves and
the information they provide about the components of the universe.
Essential Questions1. What is the electromagnetic
spectrum?2. What information do
different frequencies reveal about the components of the universe?
Warm Up: Complete the Before Column
Electromagnetic Spectrum
The Known Universe
Spectroscope Activity
Comparative Investigation: Collecting data on two or more groups, items, or
conditions in order to compare or contrast.
What is a comparison? Give an example of a comparative investigation.
Spectroscope Activity
Procedures: Copy the Observation chart into your Notebook Obtain a Spectroscope from your teacher View the Incandescent Light Bulb, record your
observations and then make some inferences View the Florescent Light, record your observations
and then make some inferences. Compare your observations and inferences. Use
your comparisons to make an “I think…” Statement
Spectroscope Activity
Compare and contrast the observations you made using the spectroscope.
Spectroscope Activity
The light that we see with our eyes is called the VISIBLE LIGHT SPECTRUM. It makes a small portion of all the light around us.
http://www.chemistryland.com/CHM130W/10-ModernAtom/Spectra/SpectroscopeAndLights.jpg
Spectroscope Activity
Human eyes can not distinguish between all of the colors of the visible spectrum
A PRISM are used to separate the colors in visible light so human eyes can see them.
Your SPECTROSCOPE is a PRISM.
Spectroscope Activity
Every element emits different colors in the visible light spectrum. We can use a spectroscope to see what colors each element emits.
Spectroscope Activity
Let’s look at what you observed
Bulb: No Mercury Florescent Light: Contains Mercury
Which element below has more electrons? Which element has the most electrons?
What RELATIONSHIP do electrons have to the color that the elements give off
Hydrogen
Helium
Mercury
Uranium
Spectroscope Activity
How can Scientists use this information to find out about stars in the Universe?
Spectroscope Activity
What other kinds of electromagnetic wavelengths are around us.
Make observations of the electromagnetic spectrum with your group.
Electromagnetic Spectrum
http://www.chemwiki.ucdavis.edu/@api/deki/files/4999/=675px-EM_Spectrum_Properties_edit.svg.png