Unit 7 · Lesson 1
5 steps. Each one is a short story and a question to answer.
A computer is not one thing. It is many parts working together.
The parts you can touch and see are called hardware.
Devices attached from outside are called peripherals, including input devices like the keyboard.
And output like the screen and printer, plus devices that do both like a touch screen.
A printer is a(n)...
Pick an answer
Peripherals: input (keyboard), output (printer), and both (touch screen). The parts you can touch and see are called hardware. Devices attached from outside are called peripherals, including input devices like the keyboard.
CU + ALU = the CPU, with memory, storage, input and output. The control unit (CU) organizes and directs the other units. The arithmetic and logic unit (ALU) does the operations. Together they are the CPU, the brain of the computer.
RAM is temporary and fast, secondary storage is permanent. The main memory (RAM) holds data temporarily while running, and loses it when the device is off. Secondary storage such as SSD, HDD and USB keeps data permanently.
Data flow = data moving, control flow = organizing signals. Data flow: moving the data itself between units, such as from input to memory to the CPU. Control flow: the signals the control unit sends to tell each unit what to do and when.
Interface = connection: USB for devices, HDMI for screens, Ethernet for networks. An interface is the means of connection between two components so they exchange data. USB connects flash drives and mice. HDMI connects a screen with sound and picture.
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Every idea in the lesson with its rule, ready to screenshot and revise from.
Peripherals: input (keyboard), output (printer), and both (touch screen)
CU + ALU = the CPU, with memory, storage, input and output
RAM is temporary and fast, secondary storage is permanent
Data flow = data moving, control flow = organizing signals
Interface = connection: USB for devices, HDMI for screens, Ethernet for networks
One question from every step. Answer and see your score.
Question 1 of 5
A printer is a(n)...
Unit 7
Meet the parts of a computer: input and output devices, the control and arithmetic units, memory and storage, and how data moves between them, in an animated explainer.
The same explanation as the 3D scene, written out for quick review.
Peripherals: input (keyboard), output (printer), and both (touch screen). The parts you can touch and see are called hardware. Devices attached from outside are called peripherals, including input devices like the keyboard.
Page 151
CU + ALU = the CPU, with memory, storage, input and output. The control unit (CU) organizes and directs the other units. The arithmetic and logic unit (ALU) does the operations. Together they are the CPU, the brain of the computer.
Page 152
RAM is temporary and fast, secondary storage is permanent. The main memory (RAM) holds data temporarily while running, and loses it when the device is off. Secondary storage such as SSD, HDD and USB keeps data permanently.
Page 154
Data flow = data moving, control flow = organizing signals. Data flow: moving the data itself between units, such as from input to memory to the CPU. Control flow: the signals the control unit sends to tell each unit what to do and when.
Page 156
Interface = connection: USB for devices, HDMI for screens, Ethernet for networks. An interface is the means of connection between two components so they exchange data. USB connects flash drives and mice. HDMI connects a screen with sound and picture.
Page 158