1. The Electromagnetic Spectrum
What It Is and How it Helps Us Judge Distances in Space
Note to Teachers: Please feel free to use only what you need! This PowerPoint is meant to be an additional tool, able to be used at any time to address the topics listed above. It does not have to be used with the lesson plan created, and it is not meant to be taught in its entirety during a class session. It can be a valuable tool for note taking or explanation purposes at the appropriate times. Feel free to change it to fit your needs!!
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2. This is a picture of the electromagnetic spectrum with useful information on the sides. This was found online when searching for images of electromagnetic spectrum. You can make it larger if necessary.

3. The Electromagnetic Spectrum:
Waves found on the ________________ _____________________ need _______________. They are ___________________waves that travel through ___________________!!
They travel as _________________ in _________________ and __________________
__________________________= 300,000,000 meters/second (Takes _________ 8 minutes to travel from _________ to _________ at this speed!!)

4. How the EM Spectrum Helps Us Judge Distances in Space:
_____________ are measured in ________ ________ 1 light year is how far _________ ____________through space in 1 year.
Because it takes so long for light to travel through space, the light arriving at us would have actually left the object many years ago.
Looking at a far-away star is like looking back in time!!!

5. How the EM Spectrum Helps Us Judge Distances in Space:
________________ _____________ is arranged on the spectrum from __________ to ____________ ______________, from _______ to __________.
The _________ the _____________ the ___________ the _______________
The ___________ the ___________ the ____________the _______________.
Look at the capitol letters, they are there as hints to help remember!! Let’s look at a picture on the next slide

6. This is one picture of the EM Spectrum
This is one picture of the EM Spectrum. Notice the Wavelength and Frequency of the Waves. What do you see?

7. How the EM Spectrum Helps us Judge Distances in Space:
But still, how does this help us see objects in space? Well…
Because different types of radiation _______ travel through our atmosphere at _____________ _____________ and ________________, scientists can determine where an object is located by the type of radiation wave emitting through our atmosphere!!

8. Here is another example of the EM Spectrum
Here is another example of the EM Spectrum. This picture gives you real world examples to compare the size of the waves to.

9. Radio Waves and Microwaves
_________________have the _________________ and _________________of all the electromagnetic waves.
A radio picks up radio waves through an antenna and converts it to sound waves.

10. So cool! Or hot, I should say!!
Microwaves
_____________ are a type of ________________. They have the __________________and the __________________of the _____________.
Microwave ovens transfer energy to the water in the food causing them to vibrate which in turn transfers energy in the form of heat to the food.
___________________ are also used by _______________ and pagers!
So cool! Or hot, I should say!!

11. Infrared Rays _________________and __________than _____________.
You can feel the longest ones as warmth on your skin!
________________ give off ______________and so do ______________!!
Pictures called Thermograms show regions of different body temperatures! _______________ the _____________________given off by the elephant.

12. ___________
This is the light we see by everyday. It has ___________________and a ______________________________________.
This means it is ___________________on the __________________.
Remember _____________, the colors of the rainbow!!

13. _________________ These have __________________________________.
They ______________________________.
Used to kill bacteria and sterilize equipment!
Causes skin to produce vitamin D, good for teeth and bones!! But, too much can cause SKIN CANCER!!! USE SUNSCREEN!!!!
Used to treat jaundice in some newborn babies
Jaundice is caused by an build up of bilirubin. Bilirubin is a yellow chemical in hemoglobin, the substance that carries oxygen in your red blood cells. As red blood cells break down, your body builds new cells to replace them. The old ones are processed by the liver. If the liver cannot handle the blood cells as they break down, bilirubin builds up in the body and your skin may look yellow.
Many healthy babies have some jaundice during the first week of life. It usually goes away. However, jaundice can happen at any age and may be a sign of a problem. Jaundice can happen for many reasons, such as:
Blood diseases
Genetic syndromes
Liver diseases, such as hepatitis or cirrhosis
Blockage of bile ducts
Infections
Medicines

14. ____________ ________________________________________
_________________; can penetrate through most matter!
Bones and teeth absorb x-rays; that is how we see them in the x-ray picture.
Too much can cause cancer!!

15. ____________ ___________________________________!
___________________________________!!
Used in radiation treatment to kill cancer cells.
Very harmful if not used correctly!!!

17. Using the EM spectrum to view Space!!!
Animation – View a Galaxy at different wavelengths!

18. Use this link to complete the web-quest activity for electromagnetic waves:
Go to my webpage for a copy of the worksheet.