STD IX Chapt- 2 ICT Tools

1.     ICT Tools

Q.1 Fill in the blanks

1. A trackball is an ……………. Device. input

2. ……………. Is the cheapest type of computer. Tablet Computer

3……………… are the recently available type of visual display unit. Smart TV

4.In the general packet ……………… service (GPRS) data is split in to packets and transmitted to broadcast frequencies. Radio

5. GSM is acronym for ……………. System for mobile communication. Global

6. CDMA is an acronym for code division …………………… access. Multiple

7. ……………… provides higher channel capacity than TDMA. CDMA

8. With ……………, there are fewer dropped calls. CDMA

9. …………. Is the information Superhighway. Internet

10. Internet uses …….. Communication technology. Digital

Q2. State true or false

1.     A computer is an interactive device True

2.     A computer can execute only those instructions which are defined in its library, True

3.     Advance mobiles use Bluetooth for internet access. False

4.     CDMA stands for Cell Division Multiple Access. False

5.     CDMA is popular over the world. False

6.     CDMA provides higher channel capacity and data throughput than TDMA. True

Q3. Rewrite the following statements by selecting correct options

1.     An example of input device of an computer is …………………….. Trackball.

2.     …………….. is a technology of wireless connectivity of two devices. Bluetooth

3.     The recently introduced type of television receiver set is ………….. Smart TV

4.     The input device of tablet computer is …………………  Touch screen

Q4. Rewrite the following statements by selecting two correct options

1.     Technologies of wireless connectivity are ………… ……………. Wi-Fi , Bluetooth

2.     The two most common types of mobiles are …………. …………….GSM , CDMA

Q5. Answer the following questions.

1.     Give any four examples of input devices and output devices.

Ans: Input Devices:

a.     Mouse

b.     Keyboard

c.      Joystick

d.     Microphone

e.     Scanner

Output Devices:

1.     Monitor (LED, LCD, CRT etc)

2.     Printers (all types)

3.     Plotters

4.     Projector

2.     Give any four examples of

Memory devices of computer:

RAM (Read Only Memory), ROM (Random Access Memory), HDD (Hard disc), Floppy Drive

Common Application of Computer

MS word, MS Excel, MS PowerPoint, MS Access

3.     State any four types of Computers available today?

Ans:   Super Computer, desktop personal computer (PC), laptop/notebook, palmtop/tablet.

4.     Specify the types of televisions available?

Ans:  TV sets have progressed from monochrome to colour. Different types of colour TV monitors are CRT (Cathode Ray Tube), Plasma, TFT LCD(Thin Film Transistor Liquid Crystal Display)and LED (Light Emitting Diodes). The original Black and White Television was replaced by the color Televisions around 1980. These were made of Cathode Ray Tubes (CRT) and are now losing popularity as they are bulky. Liquid Crystal Display Televisions (LCDs) consume less power and occupy less space. The costlier and better TVs today are the Light Emitting Diode (LED) TVs and the Plasma TVs.

5.     State any four applications supported by modern mobile phones and tablet PCs?

Ans: Modern mobile phones support camera, media players, FM radio, personal information manager applications, web browsing, and Wi-Fi and Bluetooth connectivity.

6.     What is Touch Screen?

Ans:  A touch screen is a computer display screen that is also an input device. The screens are sensitive to pressure; a user interacts with the computer by touching pictures or words on the screen.

7.     Write a short note on mobile phone standards?

Ans: A mobile phone is a portable telephone that can make and receive calls over a radio frequency carrier while the user is moving within a telephone service area. The radio frequency link establishes a connection to the switching systems of a mobile phone operator, which provides access to the public (PSTN). Most modern mobile telephone services use a cellular network architecture, and therefore mobile telephones are often also called cellular telephones or cell phones.

8.     State the advantages of CDMA Technologies?

Ans:  

Many users of CDMA use the same frequency, TDD or FDD may be used

Multipath fading may be substantially reduced because of large signal bandwidth

 No absolute limit on the number of users, Easy addition of more users.

Impossible for hackers to decipher the code sent

Better signal quality

No sense of handoff when changing cells

The CDMA channel is nominally 1.23 MHz wide.

CDMA networks use a scheme called soft handoff, which minimizes signal breakup as a handset passes from one cell to another.

CDMA is compatible with other cellular technologies; this allows for nationwide roaming.

The combination of digital and spread-spectrum modes supports several times as many signals per unit bandwidth as analog modes.

9.     Write the uses of Internet?

Ans:

The main uses of the Internet are as follows.

·         Communication: E-mail, and Chat are one of the most important uses of the Internet. These methods are faster more reliable and free and therefore very popular.

·         Business: The Internet has helped businesses by bringing suppliers and manufacturers closer. Using the Internet businesses can directly interact with the consumer thus eliminating the need for costly infrastructure.

·         Social Networking and Personal: The internet has helped bring people across the globe closer. People who have lost contact with each other for several years have been able to re-establish their friendship using social networking sites. Using the Internet it is also possible to make new friends.

·         Entertainment: Besides e-books, tv programs, and music we can also find movies and various other forms of entertainment using the Internet.

·         Employment: In addition to creating several jobs in areas that were formerly not available, the Internet also helps employers and employees get in touch with each other in a cost effective manner.

·         Other services: With the help of the Internet, services such as Banking, Ticketing, Hotel Booking have all become easier.

Q6. Answers in brief:

1.     Write a note on computers?

Ans:

A computer is a general purpose device that can be programmed to carry out a set of arithmetic or logical operations automatically. Since a sequence of operations can be readily changed, the computer can solve more than one kind of problem.

Conventionally, a computer consists of at least one processing element, typically a central processing unit (CPU), and some form of memory. The processing element carries out arithmetic and logic operations, and a sequencing and control unit can change the order of operations in response to stored information. Peripheral devices allow information to be retrieved from an external source, and the result of operations saved and retrieved.

2.     Write a note on Cellular Phone?

Ans

A mobile phone also known as a wireless phone, cell phone, or cellular telephone is a very small portable radio telephone. The mobile phone can be used to communicate over long distances without wires. It works by communicating with a nearby base station (also called a "cell site") which connects it to the main phone network. As the mobile phone moves around, if the mobile phone gets too far away from the cell it is connected to, that cell sends a message to another cell to tell the new cell to take over the call. This is called a "hand off," and the call continues with the new cell the phone is connected to. The hand-off is done so well and carefully that the user will usually never even know that the call was transferred to another cell. A cell phone combines technologies, mainly telephone, radio, and computer. Early cell telephones used analog networks. They became rare late in the 20th century. Modern phones use digital networks.

The first digital networks are also known as second generation, or 2G, technologies. The most used digital network is GSM (Global System for Mobile communication). It is used mainly in Europe and Asia, while CDMA (Code-Division Multiple Access) networks are mainly used in North America. The difference is in communication protocol. Other countries like Japan have different 2G protocols. Some 2G networks are still used. 3G are more common, and some places have 4G.

STD IX Chapt- 1 Concept and Necessity of ICT

1.     Concept and Necessity of ICT

Q.1 Fill in the Blanks.

1. ……………. , conversions and images are various forms of information. Data

2. The use of ICT offers ……………, affordable and convenient tools for education. Equitable

3. Using ICT. The …………….. can chose time and place of learning. learner

4. In manufacturing industry , robots are used for ……………… Production

5. A ……………. Simulator is used for training aircraft pilots. flight

6. Simulators used in medical training help the students to perform difficult and ……….. procedures without endangering lives of patients. invasive

7. Experiments on animals involve ………… implications of real –life procedures. ethical

8. ICT can overcome geographical barriers to reach educational opportunities to ……………… populations. Isolated

Q.2 State True or False

1. Local and wide area networks are used to gather and share information. True

2. ICT offers equitable and affordable tools for education. True

3. ICT can be used only for formal education in educational institutes. False

4. The use of robots in industrial production is one use of ICT. True

5. Computer simulations are risky and expensive as compare to real life learning. False

6. It is not possible for isolated populations to take advantage of ICT for education and entertainment. False

Q.3 Rewrite the following statement by selecting the correct option.

1. ICT promotes a learning environment that is ……………. Collaborative

2. Computer simulations in medical training use ………….... virtual reality

Q.4 Rewrite the following statement by selecting two correct options.

1. Forms of information include…………….. data, images

2. uses of ICT at home include ………………..  internet shopping, internet banking

3. Computer simulations are ………………… economical, safe

Q.5 Answer the following questions:

1. Explain the Term ICT.

Ans: ICT is the abbreviation for Information and Communication Technology, which is the combination of information processing and communication technologies. It covers all forms of computer and communications system, and the application that are used to create, store, transmit , analyze, manipulate and share information in its various forms.

2 Name the following:

Ans:

1.     Various forms of information are data, voice , images.

2.     Some of the devices used for gathering and sharing information are mobile phone, PC, laptop, CD-ROM, video disc, interactive radio and cable TV.

3.     Local Area Network (LAN) and Wide Area Network (WAN) satellite communication and telephone.

4.     Email or electronic mail is the most widely used service on the internet for exchanging messages.

3. State four objectives of ICT aims to achieve in the field of education.

Ans:

1.     Allow all sections of society (including poor and marginalized) to gain access to all levels of education.

2.     Improve and enhance the quality of both teaching and learning.

3.     Fulfill the concept of lifelong learning.

4.     Allow ICT – enabled non formal education.

4.  Name the following

1.     Types of communication in ICT

 include electronic mail, video conferencing, facsimile and telephone conferencing. ICT communication deals with storage, retrieval transmission and manipulation of digital information. ICT communication uses ICT devices to connect businesses, organizations and individuals.

Q6. Answer in brief:

1.     State the implications of ICT in Education?

The trend towards an information based society with widespread use of information and communication technology (ICT) is expected to shape the learning process and learning environment  in the future. Some of the implications of ICT area as follows:

1.     ICT enabled learning will crucial in acquiring up to date knowledge and new skills to remain socially competitive.

2.     ICT can provide different and better learning options and thus make self learning faster and more interesting.

3.     ICT enables any time any where learning. It can provide learner flexibility to choose time pase and place to learn.

4.     ICT can overcome physical and geographical barriers to connect learning individuals to share their learning experiences.

5.     ICT literacy and skills are necessary for employment self development and active participation digitalized and network society.

Q.2 State the uses of ICT in day to day life?

Business: ICT is used in Business since it allows customers and suppliers to get in touch with each other. A buyer can easily compare products from different suppliers while suppliers cut down on costs which can be passed on to the buyers.

Industry: Products are increasingly designed and manufactured in industry using computers. Computers are also used in process control and inventory.

Home: In today’s busy world the Internet is used to carry out various functions like home banking, bill payments, shopping, learning as well as playing games.

Education and Training: Educational Software is today designed for all levels of learning from preschool right up to post-graduate students. The use of virtual reality technology allows simulators to be built which give the feeling of riding a motorbike, an airplane or even going down an active volcano.

Entertainment and Arts: Computer animation is widely used in the film industry. The use of computers in creating special effects increases the appeal of films. Music and Sound effects generated by computers are widely used. Computers are also used in diverse fields like painting, touching up photographs and even for learning dancing.

Science and Technology: Computer simulations provide a cheap and safe way for scientists to conduct their experiments. In situations where a large number of calculations have to be performed quickly, such as weather forecasting or studying genes, the use of computers is indispensable.

Q3. State the role of ICT in Science and technology?

Computer simulations provide a cheap and safe way for scientists to conduct their experiments. Whether it is learning to fly an aircraft on a flight simulator, studying the effects of an explosion or even the internal organs of a human being, the use of computers provide a safe cheap and ethical way. In situations where a large number of calculations have to be performed quickly, such as weather forecasting or studying genes, the use of computers is indispensible. The Human Genome Project or the search for the Boson Higgs would be impossible without the extensive use of computers.

Q4. State the advantages of ICT in field of education?

Expanding Educational Opportunities: The use of ICT overcomes geographical and social boundaries and allows us to reach isolated populations.

Increasing efficiency: The use of ICT allows students to learn with the help of study material prepared by experts.

Enhances quality of learning and teaching ICT improves the quality of teaching by making available to the teachers use of new technology and thus developing good teaching material. Students can learn at their own pace and at their own time.

Sustaining life-long learning. Learning is a continuous process and ICT helps one to learn even though one may not be attending a formal school or college. ICT fulfills the requirement of learning for all, anywhere and anytime.

Improving policy planning and management. Educational institutes use ICT at the time of admissions, administration and student and teachers assessment.

Q5. Explain the use of ICT in business and industry?

In Business: ICT help a seller in business transactions with customers and suppliers. A customer can get information about a product and its cost. A seller and customer can communicate about the sale, payment, and delivery of product. A seller can contact a supplier for purchase rates, delivery etc.

In industry: Computers are used in designing industrial products and automate and control their manufacturing process. Robots may also be used in production. For optimum inventory of raw materials and parts, computers are used in inventory control.

Std-X ICT th Geogebra

Std X

Geogebra

Q. 1 .  Fill in the blanks : (1 mark each)

1)      The menu command used for hiding the axes is View-> Axes

2)      The tool used for the measurement of an interior angle is the angle  tool.

3)      Click  Edit -> Object Properties   to show and edit all the created objects.

4)      Constructed objects and graphs of functions are shown in the Graphics view.

5)      An angle bisector can be constructed by clicking the angle bisector tool , and  three points of the angle  in succession.

Q. 2.  State whether the following statements are true or False.              

1.	Midpoint of a segment can be found without using the ‘ Mid Point or Center’ tool or the Input Bar	False
2.	When using the Graphics view , it is necessary coordinate axes.	False
3.	Commands In Geogebra can be selected from the list next to the input field on the Input Bar.	True
4.	When a segment is drawn using the ‘Segment with given Length from the point’ tool, moving the end-point moving the end-point of the segment changes the length of the segment.	True
5.	With the ‘ New Point ‘ tool selected, clicking at the intersection of two objects adds a new point at the intersection.	True
6.	GeoGebra can be used to Solve Simultaneous  equations Geometrically.	True
7.	The GeoGebra screen [window] is divided into three parts.(March 14)	True
8.	By Default, the Geogebra window displays three parts – Algebra , Graphics and Spread sheet.	False.
9.	The Command to draw Histogram [{List Of data } {List of Class boundries}]	True

      Q. 3  Multiple Choice Questions: ( Single Correct Answer)  (1 mark each)

(1) Geogebra was created by  Markus Hohenwarter

a) CDAC                b) Google            c) Markus Hohenwarter               d) Judith Hohenwarter

(2) A file created in Geogebra is saved with  the .ggb extension.

a) .ggb                  b) .gba                  c) .ggr                   d) .gbr

(3) A segment of fixed length is drawn using the  Segment with fixed length   tool.

a) .segment between two points             b) . Segment with fixed length   

c) .Vector from point                                     d) Fixed Segment

4) A histogram of a data list is drawn by Typing the histogram command in the Input bar.

(a) Selecting ‘Create Histogram’ command from the right-click menu

(b) Selecting ‘Create List ‘ command from the right- click menu

(c) Using the ‘Regular Polygon’ tool

(d) Typing the histogram command in the Input bar

5) The Mode[] command in GeoGebra must be supplied with data list as parameter.

(a) Coordinates (b) histogram (c) data list (d) list of class boundaries

6) The input bar is used to input data required for calculations and geometric constructions.(March ’14)

(a) Scroll bar (b) input bar (c) output bar  (d) menu bar

Q.4. Rewrite the following statements by selecting two correct options : (2 marks each)

1) Every object in GeoGebra has algebraic and geometric representations

(a) algebraic (b) text (c) geometric (d) spreadsheet

2) In GeoGebra, you can do different _______and ________ construction and processes easily with the help of set of instructions.

(a) Geometric (b) geographic (c) biological (d) algebraic

3) Class boundaries specified in the Histogram[] command determines ________ and ___________ of each bar of the histogram.

(a) Height (b) width (c) position (d) shading

4) The Input bar in GeoGebra has ________and _________.

(a) Settings button  (b) input field  (c) Undo/ Redo button  (d) command button

5) Two tools in GeoGebra to draw a circle of specific radius are Circle with Centre and Radius and Circle with Centre through Point .

(a) Circle with Centre and Radius (b) Circle with Centre through Point

(c) Compass (d) Circle through Three Points

6) Different complicated theorems and geometrical constructions can be understood very clearly with the of GeoGebra .

(a) Questions (b) GK (c) theorems (d) geometrical

Q.5. Match the following :(1 mark for each option)

Column A	Column B
1. Regular Polygon	(a)
2. Midpoint or Centre	(b)
3. Angle with Given Size	(c)
4. Circle with Centre through Point	(d)
5. Angle Bisector	(e)

Ans. (1)-- b 

        (2) –d

        (3)--e

        (4) --a

        (5) –c

Q.6 Answer the following questions : ( 2 marks each)

1) What are the main parts of the GeoGebra window ? Give names of the different parts of the GeoGebra window.

Ans.  The different  parts of the GeoGebra window are (i) Title bar (ii) Menu bar  (iii) Tool bar  (iv) Algebra View  (v) Graphic View and (vi) Input bar

2) Explain Graphics View and Algebra View in GeoGebra.

Graphics View: Using the construction tools available in the Toolbar you can do geometric constructions in the Graphics View with the mouse. Select any construction tool from the Toolbar and read the Toolbar Help (next to the Toolbar) in order to find out how to use the selected tool. Any object you create in the Graphics View also has an algebraic representation in the Algebra View.

Every icon in the Toolbar represents a toolbox that contains a selection of similar construction tools. In order to open a toolbox, you need to click on the small arrow in the lower right corner of the Toolbar icon.

Algebra view: In the Algebra View, mathematical objects are organized as free and dependent objects. If you create a new object without using any other existing objects, it is classified as a free object. If your newly created object was created by using other existing objects, it is classified as a dependent object.

Using the Input Bar you can directly enter algebraic expressions in GeoGebra. After hitting the Enter key your algebraic input appears in the Algebra View while its graphical representation is automatically displayed in the Graphics View.

3) Draw the following construction tools [ in GeoGebra] : (i) Polygon (ii) Angle.

4) Give the uses of the following tools in GeoGebra.

Q- 7) Answer the following  (4 marks each)

1)      What is GeoGebra OR Write short note on Geogebra  ?

Ans. Geogebra is a free, open source and multiplatform software that combines dynamic geometry , algebra, calculus, spreadsheet, graphing and statistics.Geogebra  is one easy – to use package. The name , GeoGebra is derived from Geometry and Algebra.  GeoGebra was created by Markus Hohenwarter in 2001-02 as part of his Masters and PhD project in Mathematics. Students can learn mathematics using computer with the help of software called ‘Geogebra’ .  It was specially designed for middle school and high school students and has won several prestigious awards. GeoGebra is multi-faceted tool. It can be used as both teaching & a learning tool.

2)    What would you use to type the equation for drawing graph in Geogebra.?

Ans In Geogrbra, a graph is drawn by typing its equation in the input field of the Input bar and pressing the Enter key. The rules for the algebraic input are as follows.

(1) Only x and y in lower case can be used as variables.

(2) A linear equation in two variables can be entered  in standard form.

3. Give two methods to find mean, mode and median of given data.

To find out mean median and mode of a list of sample data, the list may be created in two ways in Geogebra, namely, using input bar or the spreadsheet view.

Method 1 : In the input field of the input bar, type the sample data as a comma delimited list with in braces (Curly brackets). It may be named using lower or upper case letters. If no names are given, the program names them as list1, list2 etc. The Algebra View displays the list and its name under free objects.

Method 2: Enable the spreadsheet View from the View menu. Enter the data in the first column or row. Select all data by dragging the mouse and select Create List from the right- click context menu. The algebra view displays the list and its name.(L1, L2, etc) under dependent objects.

Suppose a list has been created with a name L1. To find the mean, median and mode of the list, type each command with the list name enclosed within square brackets  in the input bar, Mean [L1],Median [L1], Mode [L1] and press enter key. The algebra view displays the values under dependent objects.

Q 5. Solve the following examples using GeoGebra.

5.      Construct an equilateral triangle PQR and measure its angles.

   Ans. Steps for Solution :

(1)   First we have to select view menu in that we have to click on axes option for getting clear screen.

(2)   For construction of an equilateral triangle, select ‘regular polygon’ tool .

(3)   Create an equilateral triangle by selecting two base points. Then a window will open to specify the number of sides, then type 3 and click on ‘OK’

(4)   To measure the angle , click on angle tool from the construction tool and select the points in counter clockwise.

6.      Construct a regular polygon with 6 side . Use ‘polygon’ tool.

 Ans. Steps for Solution :

(1)   First we have to select view menu in that we have to click on axes option for getting clear screen.

(2)   For construction of an regular polygon, select ‘regular polygon’ tool .

(3)   Select two base points A and B.

(4)   Type the number of sides of the polygon (Enter ‘6’)

8.      Draw angle with measurement 133^o and bisect it with ‘angle bisector’ tool.

 Ans. Steps for Solution :

(1)   First we have to select view menu in that we have to click on axes option for getting clear screen.

(2)   Select the ‘angle with given size’ . option and select two points on the graphic section  and enter the measurement of the angle (133^o)

(3)   Then the third point will be displayed. Then select segment between two points and select the points in the order.

(4)   Select the angle bisector and select the points in the order (A,B,A’)

 10. Draw a circle with radius 3.1 cm and draw tangents to the circle from points 6.5 cm     away  from centre.

Ans. Steps for Solution :

(1)   First we have to select view menu in that we have to click on axes option for getting clear screen.

(2)   For drawing circle with given radius we have taken ‘circle with centre and radius ‘ tool.

(3)   We have inputed given radius 3.1 cm in input window which was displayed on screen and click on ‘OK’ option for getting circle.

(4)   Select ‘segment with fixed length ‘ option from the tool and click on the centre of the circle. Then the input box will appear to enter the length, type 6.5 in the input box, a line will be drawn by joining the centres and the point B which is 6.5 cm away from the centre.

(5)   For construction of tangent , select ‘tangent tool’ after that click on the point B which is 6.5 cm away from the centre and on circumference of circle respectively. Tangent will be constructed at that point.

12. Plot the points A(4,-3) and B(-2,5) join  them and find equation of line and write the steps for solution.

 Ans. Steps for Solution :

(1)   Here we want axes for establishing given points . For that we have selected ‘Axes’ and ‘Grid’ tool  view menu.

(2)   We have taken ‘New Point’ tool for plotting given points.

(3)   For drawing line, click on ‘line through two points’ tool.

(4)   Now the Algebra view shows the equation 4x+3y=7