1. Electromagnetic Spectrum and Space Objectives Identify different wavelengths on the electromagnetic spectrum. Discuss electromagnetic waves and the information they provide about the components of the universe. Essential Questions 1.What is the electromagnetic spectrum? 2.What information do different frequencies reveal about the components of the universe?

2. Warm Up: Complete the Before Column

3. Electromagnetic Spectrum The Known Universe

4. 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.

5. 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

6. Spectroscope Activity Compare and contrast the observations you made using the spectroscope.

7. 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

8. 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.

9. Spectroscope Activity Every element emits different colors in the visible light spectrum. We can use a spectroscope to see what colors each element emits.

10. Spectroscope Activity Let’s look at what you observed Bulb: No Mercury Florescent Light: Contains Mercury

11. 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

12. Spectroscope Activity How can Scientists use this information to find out about stars in the Universe?

13. Spectroscope Activity What other kinds of electromagnetic wavelengths are around us. Make observations of the electromagnetic spectrum with your group.

14. Electromagnetic Spectrum http://www.chemwiki.ucdavis.edu/@api/deki/files/4999/=675px-EM_Spectrum_Properties_edit.svg.png