What is a motherboard, and what is its general role in a computer?

### Why this is right A computer’s components need both physical connections and pathways for exchanging information. The motherboard provides these connections and pathways, linking the processor, memory, storage devices, and expansion devices so they can work together. It also distributes power to connected components. ### The concept A **motherboard** is the computer’s main circuit board, a flat board with electronic pathways and connectors. The **processor** performs instructions, while **memory** temporarily holds information the processor is using; both connect to the motherboard, often through sockets or slots. Storage devices connect through **storage interfaces**, which are the connectors and communication pathways used to transfer data. **Expansion devices**, such as a separate graphics card, plug into slots to add capabilities. The motherboard’s pathways, called **traces**, carry signals between components, while connections to the power supply distribute electrical power. The motherboard coordinates connections; it is not the processor, storage device, or power supply itself. ### What a good answer covers - Identifies the motherboard as the computer’s main circuit board. - Explains that components connect to it directly or through interfaces. - States that it lets components communicate. - Notes that it distributes power to connected components. ### Terms - **Circuit board**: A board with electronic components and pathways that connect them. - **Processor**: The component that carries out computer instructions. - **Memory**: Temporary storage for information the processor is currently using. - **Storage interface**: A connector and communication pathway linking a storage device to the computer. - **Expansion device**: A component added to provide or improve a computer function. - **Trace**: A thin conductive pathway on a circuit board that carries electrical signals. - **Power supply**: The component that provides electrical power to the computer’s parts. ### Remember Think of the motherboard as the computer’s central connection board: it links components so they can communicate and receive power.