Unit 6 Exam Study Guide

You should know the following:

1. What does sound absolutely have to have in order to get from one place to the next?
2. What is pitch? How does the frequency of a sound effect the pitch of the sound?
3. How does a microwave oven work?
4. What is the electromagnetic spectrum? What are electromagnetic waves made of? Can you list the seven general parts of the electromagnetic spectrum in order from longest wavelength to shortest wavelength and give an example or use of each?
5. What does wavelength do to the frequency of an electromagnetic or sound wave? How is wavelength related to the amount of energy in an electromagnetic wave?
6. What is refraction of light? What causes refraction? What colors does white light separate into when it refracts through a prism? Can you list those colors in order from longest wavelength to shortest?
7. What is reflecting off of objects that allows us to see them? HINT: THGIL spelled backwards.
8. What are some similarities and differences of light and sound? Compare their speed, how they travel, type of wave, and how we perceive them.
9. In order to test an idea you would:

• Make a hypothesis: “IF I do _______________ , THEN I think _______________ will happen.”
• Test the hypothesis: “I will change ____________ and record what happens. I will repeat it several times.”
• Analyze the data: “I wrote down my observations in this chart and then made a graph.”
• Make conclusions based on facts: “When I did _______ the measurement changed to ________, this proves/disproves my hypothesis as correct.”
  

You would always double check your measurement numbers (dependent variables) and keep all variables the same (controlled variables) except the one that you are testing (independent variables).
Using this slide show as a guide....

.....find the mistakes in Tibby's Lab Report.

Here are the slides for Unit 6


And here is a video clip about the EM Spectrum: