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