Wave Forms
The very top of the wave.
Crest
What is this an example of: 011100010
Binary Code
What is the definition of amplitude?
How tall a wave is from the normal water level.
A device that is used on a dock by the ocean could be taken and used on other docks in other parts of the word. True or false?
True
0 & 1
The lowest part of the wave.
Trough
Digital technology such as computers and cell phones turns voice and text messages into a code. The code is usually made up of only two symbols, 0 and 1. The order of these symbols is used to send messages over long distances to the receiving digital device. The receiving device changes the coded message into a form people can see or hear.
Why are patterns important for digital communication?
a. Patterns in the code help to keep the message secret.
b. Patterns help the digital device to send electrical signals.
c. Patterns create a code that the sending device and receiving device can understand.
d. People who receive the messages use the code pattern to create a new code.
c. Patterns create a code that the sending device and receiving device can understand.
What is the water called when there are no waves?
Normal
An engineer is designing a new type of cell phone with a special feature. The goal is for the phone to make pictures look brighter. Which of the following plans would help with this design process?
a. The engineer should test one combination of binary code and then implement it in the new
phone.
b. The engineer should test different combinations of binary code in an older phone before testing in a new phone.
c. The engineer should test different combinations of binary code to see which solves the problem in the new phone.
d. The engineer should test the one combination of binary code she thinks will work.
c. The engineer should test different combinations of binary code to see which solves the problem in the new phone.
Sound travels in a _________.
Wave
The length of the wave.
Wavelength
What does decode mean?
to take a code and turn it into a message.
The distance from one wave to another?
Wavelength
If the boats are able to leave the harbor to go fishing, there needs to be a way for them to know if it is safe to come back. If the waves are too big, it will be difficult and dangerous for them to tie their boats to the pier. Which of the following is a possible solution for reliably transmitting digitized information to the boats at any time (day or night)?
a. Each boat captain calls the harbor master before they try to return to the harbor.
b. Put a device on the bottom of the pier that raises a flag to warn boats not to return.
c. A person watches the waves and calls the boat captains on their cell phones if the waves are too big.
d. Put a device on the pier, and if the waves are big enough to hit it, a signal is sent to theboat captains’ cell phones.
d. Put a device on the pier, and if the waves are big enough to hit it, a signal is sent to theboat captains’ cell phones.
True or false: A picture can be sent through a wave
False. It must be encoded and then decoded (turned into binary code)
The measurement of the wave from the middle to the top.
Amplitude
what does encode mean?
to turn into a code
A boat is sitting on normal water that is 8 feet from the bottom of the ocean. There is a wave that is 11 feet from the bottom of the ocean. What is the amplitude of the wave?
3 feet.
What does an engineer do?
They create solutions to problems using math and science.
What is a pattern?
someting that repeats in a specific order.
Amplitude changes the _________, while wavelength changes the ________.
Volume, Pitch
In July 2015, the New Horizons Space Probe flew past Pluto. The space probe is tasked with taking detailed pictures of Pluto so that scientists on Earth can study its features. However, the spacecraft can only send sequences of numbers back to earth.
Explain how scientists on Earth will be able to view the pictures.
Answers will vary: The picture will be encoded. This means it will turn into binary code. The code will then travel to Earth and a device will receive the code. The device will decode it, which means it will turn it back into the original picture.
A pontus boat can navigate water from 0-4 feet. If the amplitude of the wave is 3 feet, can it leave the harbor?
Yes
CHALLENGE: What is the difference between a scientist and engineer?
A scientists asks questions about how the world works and investigates it. An engineers builds and designs things to solve problems.
CHALLENGE from Q1C1: Name 4 forms of energy.
thermal, light, sound, chemical, motion