What is a Bitcoin miner?

Bitcoin Miner– An asic device that is used to mine bitcoins. Bitcoin uses the sha-256 algorithm and are manufatured for the sole puropse of bitcoin mining. They vary in size from a usb stick to large metal boxes with fans, similar to a desktop computer tower. Common names include: Block Erupter, Avalon, Asic Cube, KnC Jupiter, Grid Seed
What are public and private keys?
What is the block chain?
What is a bitcoin wallet?
What is peer to peer?
What is an exchange?

What is a bitcoin faucet?