Maharashtra Board Class 9 Science Information Communication Technology
Fill in the blanks to complete the statements. Justify the statements.
[a] While working with a computer we can read the information stored in its memory and perform other actions in …………… memory.
[b] While presenting pictures and videos about the works of scientists, we can use …………..
[c] To draw graphs based on the quantitative information obtained in an experiment, one uses …..
[d] The first generation computers used to shut down because of …….
[e] A computer will not work unless …. is supplied to it.
Solutions:-
[a] While working with a computer, we can read the information stored in its memory and perform other actions in RAM memory. (Justification: RAM, or Random Access Memory, is the volatile memory in a computer that allows for quick read and write operations. It is used for actively running programs and temporarily storing data.)
[b] While presenting pictures and videos about the works of scientists, we can use multimedia software. (Justification: Multimedia software is designed to handle a variety of media types, including pictures and videos. It allows for the creation and presentation of multimedia content.)
[c] To draw graphs based on the quantitative information obtained in an experiment, one uses graphing software. (Justification: Graphing software is specifically designed for creating graphs and visual representations of data, making it suitable for drawing graphs based on quantitative information.)
[d] The first-generation computers used to shut down because of heat generated by the large valves. (Justification: First-generation computers, such as the ENIAC, used vacuum tubes or valves in their construction. These valves were large, consumed a lot of electricity, and generated significant heat, leading to shutdowns.)
[e] A computer will not work unless electricity is supplied to it. (Justification: Computers, being electronic devices, require a continuous supply of electricity to function. )
Class 9 Science Information Communication Technology Important Notes
Information Communication Technology (ICT):
Definition: ICT includes communication devices, their use, and associated services. The rapid growth of information necessitates attention to prevent knowledge obsolescence.
Devices in ICT:
Examples: Telephone for conversation, computers in various generations.
Evolution: Computers progressed through five generations, with the first generation (1946-1959) using valves and large size.
Important Components of a Computer:
Memory:
Two types: Internal (RAM and ROM) and External.
RAM is volatile and electronic, while ROM is read-only.
Operating System:
DOS (Disk Operating System) facilitates communication between the computer and the user.
Program:
A set of commands given to a computer.
Data and Information:
Data is raw, unprocessed information.
Opportunities in the Computer Field:
Software Field:
Opportunities include application program development, software package development, operating systems, and utility development.
Hardware Field:
Jobs in hardware designing, production, assembly, testing, maintenance, servicing, and repairs.
Training:
Vast field for training new entrants in computer-related jobs.
Marketing:
Demand for sales personnel with computer knowledge in establishments selling computers and accessories.
Institutes at Work:
C-DAC (Centre for Development of Advanced Computing):
Located in Pune, conducts computer research.
Contributed to the first Indian supercomputer, Param, performing one billion calculations per second.
Involved in diverse fields such as space research, earth interior movements, oil deposits, medicine, meteorology, engineering, and military.
Developed ISCII code for different language scripts (Indian Script Code for Information Interchange).
