The document discusses electromagnetic waves, including that they are disturbances that transfer energy through a field, are made up of electrical and magnetic waves that require each other to form, and can travel through a vacuum at the constant speed of light. Most electromagnetic waves on Earth come from the Sun but technology also produces them, and they are able to transfer energy as radiation without needing a medium to travel through.

1. Science Starter: February 27, 2012 You will turn this in for a grade. Write a paragraph (at least 5 sentences) that starts with “Science is…..”

2. Electromagnetic Waves have unique traits

3. What is an Electromagnetic Wave http://www.classzone.com/books/ml_science_share/vis_sim/wslm05_pg74_emwave/wslm05_pg74_emwave.html

4. Electromagnetic Waves Electromagnetic Wave- a disturbance that transfers energy through a field Also called EM waves

5. Facts about EM Waves Most EM waves are invisible, but can be perceived (examples: light and heat)

6. How EM Waves Form EM waves are made up of two transverse waves- one electrical, one magnetic Both electrical and magnetic fields MUST be present for an EM wave to form

7. Sources of EM Waves Most of the EM waves in Earth’s environment come from the Sun. Technology is also a source of EM waves

8. Transfer of Energy Radiation - the transfer of energy in the form of EM waves EM waves DO NOT require a medium to travel through EM waves CAN travel in a vacuum

9. Speed of EM Waves in a Vacuum In a vacuum, EM waves travel at a constant speed – 186,000 mi/s In one second an EM wave can travel more than 7 times around the Earth The constant speed is known as the speed of light

10. Transferring Energy How does a microwaves oven work? http:// www.youtube.com/watch?v =FGdwEPEU61U