Unit II. Computer systems lesson Theme: Living with computers

Look at A and B parts of the text. Then match the sentence beginnings (1-6) with the correct endings (a-f).
1The CPU processes data and a areas within the CPU.
2The control unit is the part of the CPU that b you can’t make changes to it
3The arithmetic and logic unit is able to make c controls the way instructions are executed
4The registers are high-speed storage d the computer is turned off
5Data contained in RAM is lost when e coordinates the other parts of the computer
6ROM memory can only be read: f calculations: add, subtract, multiply and divide


II. HOME TASK.

Task 1: Speak about the CPU, its components and functions. Make up at least 6-8 sentences.
1.______________________________________________________________________
2.______________________________________________________________________
3.______________________________________________________________________
4.______________________________________________________________________
5.______________________________________________________________________
6.______________________________________________________________________
7.______________________________________________________________________
8 .______________________________________________________________________

Task 2: Solve the clues and complete the puzzle with words from the opposite page.

1. 
   Intel…………are used in many computers.
   
2. 
   Each 0 or 1is called a bit, short for…………..digit.
   
3. 
   Special cards can be inserted into expansion…………. .
   
4. 
   A……………controls the timing within the PC by sending signals to synchronize its circuits and operations.
   
5. 
   The processor speed is measured in………………. .
   
6. 
   …………..carry signals between different parts of a PC.
   
7. 
   …………..cards improve the computer’s performance.
   
8. 
   The …………..uses ROM to control the input/output of data.
   
9. 
   The main printed circuit board is called the ……….... .