Space Science and Computer Technology Basics

ISP stands for Internet Service Provider, companies that provide access to the internet. ISPs offer services like broadband, dial-up, and wireless connectivity. The other options - Internet Survey Period, Integrated Service Provider, and Internet Security Protocol - are not the correct expansion.

WWW is the standard abbreviation for World Wide Web, the information system of the Internet that uses HTTP protocols to access documents and resources linked by hyperlinks and URLs.

Hard drive storage capacity is measured in bytes, with gigabytes (GB) being the standard unit for modern drives. MHz measures processor speed, Mbps measures data transfer rates, and 52X refers to CD-ROM drive speeds.

The CPU (Central Processing Unit) is called the 'brain' of the computer because it executes instructions, performs calculations, and coordinates all other components - similar to how a brain controls the body. RAM and ROM are memory types, and the Monitor is an output device.

ROM (Read-Only Memory) is permanent memory built into computers because it retains data without power and cannot be modified - perfect for storing boot firmware and essential system instructions. RAM is volatile (lost without power), CPU is a processor, and CD-ROM is removable media.

Standard CDs (CD-ROM, CD-R) typically store about 650-700 Megabytes of data. 1.4 MB is floppy disk capacity, 10 MB and 150 MB are far too low for CDs.

One Megabyte (MB) equals approximately one million bytes (precisely 1,048,576 bytes in binary, or 1,000,000 in decimal). The question asks for an approximation, and 'one million' is the commonly used figure. A thousand bytes is a Kilobyte, not Megabyte.

A modem (modulator-demodulator) enables computers to transmit data over telephone lines by converting digital signals to analog and back. CD-ROM drives read optical discs, RAM is memory, and hard drives store data - only the modem provides telephone-line connectivity.

ISA, PCI, and AGP are all types of motherboard expansion slots that accept expansion cards. ATX is a motherboard form factor (specifying size, layout, and mounting hole positions), not an expansion slot type.

COM1 (the first serial port) traditionally uses IRQ 4 on PC systems. COM2 uses IRQ 3, while IRQ 6 is for floppy controller, and IRQ 7 is for printer port (LPT1). These IRQ assignments are part of the standard PC architecture.

Software consists of the instructions, programs, and data that tell the computer what to do and how to do it. Hardware (like mouse and printer) are physical components, while software is the code that controls them.

Parity is an error-checking system where an extra bit is stored with each byte of data in RAM. This bit is set so that the total number of 1s in the byte (including parity) is always even or odd. When data is read back, the parity bit is recalculated - if it doesn't match, an error is detected.

RJ-11 is the standard connector used for telephone lines. It has 4-6 pins and is the small plastic plug found in phone jacks. RJ-45 is larger and used for Ethernet networks, while COM1 is a serial port designation, not a physical connector type.

The hard drive provides permanent (non-volatile) storage for files. When you save a file, it's written to the hard disk's magnetic surface and persists even after power is turned off. RAM is temporary storage that loses data when power is cut, the CPU processes data, and the monitor only displays it.

Mouse, keyboard, and scanner are all input devices - they send information TO the computer. Monitor and printer are output devices (display or produce information), and CPU is a processing component that executes instructions, not an input device.

Earth is the densest planet in our solar system with an average density of about 5.51 g/cm³, which is primarily due to its large iron-nickel core. This is significantly higher than other planets: Mercury (5.43 g/cm³) is close but smaller, while gas giants like Jupiter and Neptune have much lower densities due to their gaseous composition.

Mercury has the smallest average distance from Earth compared to other planets in our solar system, even though Venus is often called Earth's 'twin' and comes closer at certain points in their orbits. This is because Mercury's tight inner orbit keeps it relatively close to Earth on average. The Sun is a star, not a planet.

The Bay of Bengal is the largest bay in the world by area, covering approximately 2,172,000 square kilometers. It's significantly larger than Hudson Bay (around 1,230,000 km²) and Cardigan Bay (a much smaller bay in Wales). The Cape of Good Hope is a coastal promontory, not a bay.

Venus is the hottest planet in our solar system with surface temperatures reaching about 465°C (869°F), despite Mercury being closer to the Sun. This extreme heat is caused by Venus's thick atmosphere of carbon dioxide, which creates a runaway greenhouse effect that traps solar radiation. Mercury's lack of atmosphere means it can't retain heat as effectively.