Parts of a CPU

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Across
  1. 3. a tiny quartz crystal inside the CPU chip that 'ticks'
  2. 4. The part of the computer where the CPU is normally located
  3. 7. The Control Unit ..... the instructions provided by the program
  4. 8. The CPU consists of billions of tiny switches called ....
Down
  1. 1. This is a special type of very fast memory located within the CPU
  2. 2. The .... Unit monitors the flow of data between the CPU and other components
  3. 3. A small, but extremely fast type of RAM which can hold more data than a register
  4. 5. These wires transport data within the CPU and to and from RAM
  5. 6. The CPU fetches, ....... and executes instructions
  6. 9. Which part of the CPU deals with the calculations (abbreviation)