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Unit 1 - Lesson 7 part 1

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To do: September 7

Pick up your test
Please sit in your new assigned seat

Representing Numbers/Text Quiz this Friday

Warm-up 9/7:

Write all of the unique binary sequences for 4 bits.

How many are there total? What is the value of the maximum number?

Note: You will be asked to submit class notes/warm-up for HW.

Unit 1 Lesson 6

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Simpson's Treehouse of Horror VI

(season 7 ep 6 1:18, 2:40)

Unit 1 Lesson 6

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Simpson's Treehouse of Horror VI

(season 7 ep 6)

Unit 1 Lesson 6

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Simpson's Treehouse of Horror VI

(season 7 ep 6)

Unit 1 Lesson 6

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Simpson's Treehouse of Horror VI

(season 7 ep 6)

Unit 1 Lesson 6

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Unit 1 Lesson 6

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Simpson's Treehouse of Horror VI

(season 7 ep 6)

46 72 69 6E 6B 20 72 75 6C 65 73 21

Unit 1 Lesson 6

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Simpsons Treehouse of Horror VI

46 72 69 6E 6B 20 72 75 6C 65 73 21

These are ASCII values as hexadecimal numbers (base 16).

What is the message?

Unit 1 Lesson 6

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Simpsons Treehouse of Horror VI

hexadecimal: 46 72 69 6E 6B 20 72 75 6C 65 73 21

decimal: 70 114 105 110 107 32 114 117 108 101 115 33

These are ASCII values as hexadecimal numbers (base 16).

What is the message?

Unit 1 Lesson 6

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Simpsons Treehouse of Horror VI

46 72 69 6E 6B 20 72 75 6C 65 73 21 Frink rules!

in reference to Professor Frink.

Unit 1 Lesson 6

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We know how to represent numbers using binary numbers. But people usually communicate in text!

Unit 1 Lesson 6 - Wrap Up

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ASCII stands for American Standard Code for Information Interchange; the universally recognized raw text format that any computer can understand

The ASCII table is a table that maps a number to a character. The value can be expressed as a binary, decimal, or hexadecimal number.

Unit 1 Lesson 6 - Wrap Up

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The ASCII table is a table that maps a number to a character.

And "under the hood" every number is represented as a binary number (8 bit sequence) which is really just stored as electric impulses in a wire.

Unit 1 Lesson 6 - Wrap Up

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Abstraction

The ASCII table is an example of abstraction, a simpler way to represent something complex.

Unit 1 Lesson 6 - Wrap Up

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Abstraction

Unit 1 Lesson 6 - Wrap Up

how's it going?

TEXT

ASCII

174 111 119 39 115 32 105 116 32 103 111 105 110 103 63

ASCII

BINARY

We don't have to think about this layer when we send a text message… but every message is really just zeroes and ones!

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Test Corrections

Note syllabus change - grading policy
Test Corrections are worth 10 points - for each problem missed:

Summarize the question in your own words
Write out work to show how to get to correct answer
Explain your misunderstanding
Submit to Hub

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Go over test

1. B

2. C

3. D

4. C

5. A

6. D

7. A

8. D

9. D

10. B

11. B

12. B,C

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Test Corrections

Test Corrections are worth 10 points - for each problem missed:

Summarize the question in your own words
Write out work to show how to get to correct answer
Explain your misunderstanding
Submit to Hub

Representing Numbers/Text Quiz this Friday

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Unit 1 - Lesson 7

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Unit 1 Lesson 7 - Warm Up

Prompt: You recently did some online shopping and are expecting a package to arrive in about a month. The delivery service has a tracking system which reads the location of the package.

How often would you want the location read? Every week? Every day? Every hour? Every minute? Be ready to explain your answer.

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Unit 1 Lesson 7 - Activity

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Pixelation Widget: B&W

Unit 1 Lesson 7 Bubble 2

Unit 1 Lesson 7 - Activity

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Homework

Unit 1 part 1 Test Corrections

Summarize the question in your own words
Write out work to show how to get to correct answer
Explain your misunderstanding
Submit to Hub

Submit an image/pdf of your warm-up/class notes to Hub

Representing Numbers/Text Quiz this Friday