Today we’ll start by taking a Quiz over types of waves and the Doppler effect. Then we’ll review the EM spectrum with a video from NASA. Be sure to take notes on each of the classes of EM waves in the video and their applications to help you make a poster later.
For the last part of class, and you’ll make your own EM Spec diagram as a color poster.
You can use the EM spectrum diagram from the blue textbook: p. 70-71
Use a strip of paper from the back bench and Mr. Siedler’s colored pencils.
You’ll be graded on neatness but will also need:
7 classes of waves
Wave Frequency in numbers (Hz) along a line
Arrows showing increasing energy
Examples of the wave source or technology that uses that class of wave
Our Last part of the matter unit was on 2 of the main laws on the behavoir of gasses.
First, Boyle’s Law states that pressure and volume of a gas are inversely related. Boyle’s Law.
Boyle’s law happens everywhere: spray cans, air-tools, air-guns, car and bike tires. Said simply: when you squeeze a gas into a smaller space, the pressure increases (like in tires) or when you release the pressure (pressure goes down), the volume increases (like in spray cans).
Here’s a good animation of it:
The second is Charles’ Law: volume and temperature of a gas are directly proportional.
Said simply: as you heat a gas, it expands and as you cool it it shrinks. This is why your bike tires are low in cold weather. It also is why the heated air in a engine cylinder makes your car’s engine run.