ict

Properties of information. Types and forms of presentation

information

Objectives: to reveal the properties of information; classify information

by type; teach students to choose understandable forms of presentation of information

formations.

Requirements for knowledge and skills:

Students should know:

* properties of information;

* types of information;

- forms of presentation of information.

Students should be able to:

* distinguish information by type;

* indicate properties of information;

- choose the most appropriate form of information presentation.

Didactic software: PC, PowerPoint or

posters.

During the classes

I. Setting Lesson Objectives

1. Give an example of relevant information.

2. What properties does historical information have?

3. What are the disadvantages of the information posted on the Internet?

4. Is audio information analog or discrete? 57

5. "Five plus three equals eight." This is a good shape

presentation of this information or not? Why?

II. Homework check

1. Call one class member to the board and ask the other children to ask

him questions on the topic of the lesson. Evaluate both questions and answers.

2. Check problem solving (verbally).

III Presentation of new material

1. Properties of information

Let's remember that information is part of the environment around us

the world, i.e. its object. And like any object, information should have

some properties to distinguish it from other objects. what

are these properties?

Many different properties of information can be cited. Related

this is with the fact that (as you already know) different sciences have their own

Definition of the concept of information. Accordingly, the properties of information

considered with

point of view of each

scientific

discipline. For

informatics

the most important

are presented

the following properties:

objectivity,

completeness,

reliability,

adequacy,

availability and

relevance.

Let's write everything down

listed

properties

information in the form

next

tables: 57

The same information under different circumstances has

different properties. And during the information process, a person or

the technical device selects from the entire flow of information only that

which has the properties most appropriate in this situation.

Exercise 1 (in writing)

Give examples of situations in which the same information has

different properties.

Explanation:

1. Prepare the chart in advance and distribute to all students (for

saving time in the lesson).

2. Ask in the second column to draw from those present

properties listed above, lodge. If the property is not present in

in full, then draw the figure not entirely, but partially.

2. Types of information and forms of presentation

Information as an object, except that it has different

properties, and is also classified by type. Of such classifications

there are several. In addition, again, each science introduces its own

classification system. For informatics, the main thing is how

information processes are implemented by means

computing technology. Therefore, the following is accepted in informatics.

classification of types of information.57

Information

Exercise 2

Try to name the sources of analog and digital information.

Hint:

Sources of analog information:

1. Violin. Can create sound of any pitch. Transition from tone to tone

happens smoothly and continuously.

2. TV. The CRT beam continuously moves across the screen, and the brightness

the bone of individual areas changes smoothly.

3. Phone. The sound volume changes smoothly and continuously.

4. A painting drawn by an artist using a large

foliage of shades of paints.

5. Graphs of functions.

Sources of digital information:

1.piano. You cannot play sounds between the notes "mi" and "fa". Pe-

The transition from note to note is performed in a jump.

2. Monitor. The brightness of the beam will change abruptly - there is a beam (bright white or

colored point), no ray (black point).

3. Music CD player.

4. Computer.

5. Mobile phones.

Explanation: the exercise is performed orally. A few examples

write in a notebook.

Analog information can be converted into digital (for this

it is enough, for example, to assign a number to different colors or to record music

notes) and vice versa.

In computing, such transformations produce

special devices called analog-digital and digital

analog converters - ADC and DAC.

And, finally, since a person perceives analog information from

using his senses, then he seeks to fix it in such

in a way that others can understand. At the same time, the same information

tion can be presented in different forms.

Any information can be presented in the most convenient form

for perception. Moreover, there can be several such representations, and all

Discrete hopping

(perceived by computational

technique) 57

these forms will be different models of objects, processes or

phenomena.

IV. Consolidation of the learned

Answer the questions at the beginning of the lesson again.

V. Lesson summary

Evaluate class performance and name students who excelled in class.

Homework

Knowledge level: list the properties of information, its types and forms

representation.

Understanding level:

What types of information do animals and plants receive? Bring

an example of information and a situation in which it will be most appropriate.

What properties does historical information have? Why? How with

the properties of the following information have changed over time: “A computer is

a device performing computational operations ".

Creative level:

Think up or remember some information and imagine

her in various forms. Take advantage of traditional

methods and tools or appropriate software

means (graphic and text editor, spreadsheets

and etc.).