1. AGENDA Pick Up Quiz from the Side of the Room
Last chance to turn in work!!!
Check in Study Guide
Go Over Study Guide Answers
Go Over Guiding Questions Answers
Go Over Annotating Readings
STUDY!
Science Seminar  Advanced

2. HOMEWORK! STUDY! STUDY!! STUDY!!! At least 30 Minutes
Review the following
Quiz
Study Guide Key
Guiding Questions Answers
Activities
Pixel Paragraph
Digital vs. Analog Paragraph

3. Test Format Regular Test Advanced Test 32 Points 40 Points 8 Questions
4 Short Answer
5 Short Answer
1 Matching
2 Multiple Choice
1 Fill in the Blank
1 READING

4. 8.1.1 → Sample sizes
Using the image below, answer the following questions
Which Mario has more information? B
Which Mario has larger sample sizes (pixels)? A
Which Mario has a better quality?
Why?
B, Because he has more information even though he has smaller pixels.

5. Paragraph Example
The image that has the better quality is the image B.  This image is better because it has MORE pixels which gives more information.  Even though it has  MORE pixels it has SMALLER pixels which shows that larger isn’t always better.  Overall, this shows that we want SMALLER   pixels because that provides us with MORE  information which gives us a image with a better quality.

6. 8.1.1 → Sample sizes
Using the image below, answer the following questions
Which, analog or digital,  creates a more reliable sound?
Digital
Which type of wave contains more information?
Paragraph Answer
Digital creates a more reliable sound because it has more information (small sample sizes) The additional information creates a higher quality and more reliable sound.

7. 8.1.2 → Digital versus Analog
Sent as a continuous wave X
Sent as wave pulses
Sent as binary code (1’s and 0’s)
Used in an old record player when a needle follows the groove
Preserves the original shape of the sound wave

8. 8.1.2 → Digital versus Analog
Holds more information X
Transfers information easier and faster
Easily distorted when components wear down
Media can break and become outdated
Distortion occurs when waves travel through a medium or over long distances

9. Digital versus Analog Paragraph
Digital waves take the continuous wave of Analog and convert them into binary code (1’s and 0’s). While there is some debate, digital is more reliable because it holds more information and transfers information faster.  It is also more reliable because sound can only break down if the actual media components break and the media components dont wear down over time. Unlike analog, digital can also be transmitted longer distances without being distorted

10. 8.1.3 → Labeling a Wave

11. 8.1.3 → Labeling a Wave

12. 8.1.3 → Labeling a Wave Describe the amplitude and energy of wave A.
Low amplitude and Low energy
Describe the amplitude and energy of wave B.
High amplitude and high energy
How are amplitude and energy related?
Normally an increase in amplitude results in an increase in energy

13. Create a venn diagram comparing and contrasting sound and light waves
Create a venn diagram comparing and contrasting sound and light waves.  Make sure you have at least 2 similarities and at least 3 differences

14. Guiding Questions
Which is more reliable, smaller samples of information or larger samples of information?  Why?
Smaller samples of information are more reliable because they allow the sound/image to have more information. It is better to have additional samples that are smaller than less samples that are larger. The additional information allows the sound/image to be at a higher quality.

15. Guiding Questions
Which is more reliable, digitized signals or analog signals, why?
Digital waves take the continuous wave of Analog and convert them into binary code (1’s and 0’s). While there is some debate, digital is more reliable because it holds more information and transfers information faster.  It is also more reliable because sound can only break down if the actual media components break and the media components dont wear down over time. Unlike analog, digital can also be transmitted longer distances without being distorted

16. Guiding Questions Define crest, trough, and wavelength of a wave.
Crest = Top of the Wave
Trough = Bottom of the Wave
Wavelength = Distance from crest to crest OR trough to trough

17. Guiding Questions
How is the amplitude of a wave related to its energy?
An increased amplitude normally results in an increased energy.

18. Analog and Digital Article
Wave-based information was, for many years, received, stored, and produced by analog media, such as vinyl records, analog film, analog broadcast TV, and analog phones.  Analog technologies are characterized by their preservation of wave forms.  For example, vinyl records are pressed with grooves.  When the needle of the record player moves, along these grooves, it transfers the shape of the grooves into electrical signals.  Then the signals are transformed into sound waves by speakers.  

19. Analog and Digital Article
Analog phones transform sound wave energy into electrical energy using an electromagnet.  The electrical signals are transmitted along copper wire to the destination phone.  The destination phone’s earpiece then converts the electrical signal back to sound waves using a speaker.  The fact that analog signals preserve the original shape of the sound waves is sometimes considered an advantage.  However, analog signals tend to become distorted over long distances.  This is because of the properties of waves, such as their frequency and amplitude, change when they interact with matter.  In addition, the media used in analog devices, such as records and speaker heads, cause distortion when their components begin to wear out.

20. Analog and Digital Article
Digital communication is a binary code- it is like an alphabet with only two letters.  It uses 0s and 1s to represent information.  Digital converters change the information in waves to binary code by sampling, or collecting information from, parts of the wave.  Then the converter encodes those bits of information about the wave if not a binary code file.  The binary code file can be converted back to a sound wave by a digital appliance that reads, interprets, and translates the code, such as a CD player connected to a speaker.

21. Analog and Digital Article
Digitizing information has a several advantages.  Binary code is easily transmitted electronically along wires or stored on and read CDs or DVDs with pulses of light.   Binary code can also be sent through the air using radio waves.  Computer chips electronically store large quantities of binary data using capacitors.  A digital file itself never becomes distorted over time or distance, though the media data are stored on, such as CDs or flash drives, can break or become outdated.  Compared to analog methods, digitized signals are faster and more reliable way of sending information over long distances.