science & technology Online Quiz - 165

Both Venus and Mercury have no natural satellites (moons). This is relatively uncommon in our solar system - most planets have at least one moon. Mars has two small moons (Phobos and Deimos), Earth has one, and the outer planets have many.

Proxima Centauri is the closest known star to the Sun at approximately 4.24 light-years away. It is part of the Alpha Centauri star system and is a red dwarf star. Ross 248 and Alpha Centauri are also nearby but not the closest, while Sirius A is much farther at about 8.6 light-years.

Earth is the only planet in our solar system known to sustain life, due to its suitable distance from the Sun, presence of liquid water, oxygen-rich atmosphere, and protective magnetic field. Mercury is too hot and has no atmosphere; Mars has thin atmosphere and no liquid water on surface; Jupiter is a gas giant with extreme conditions.

This tests knowledge of telecommunications technology. CDMA (Code Division Multiple Access) is a channel access method used by various radio communication technologies. The other options are either made-up or refer to completely different concepts.

This tests knowledge of mobile telecommunications standards. GSM (Global System for Mobile Communications) is the standard developed by the European Telecommunications Standards Institute. The other options are either incorrect variations or unrelated concepts.

This tests knowledge of mobile technology components. SIM (Subscriber Identity Module) is the smart card that stores mobile network identification and key information. The other options are either incorrect or refer to completely different technical concepts.

This tests knowledge of consumer electronics interfaces. HDMI (High Definition Multimedia Interface) is the standard for transmitting video and audio data from a source to a display device. The other options are either made-up or refer to unrelated technical concepts.

This tests knowledge of computer connectivity standards. USB (Universal Serial Bus) is an industry standard for cables, connectors, and communication protocols. The other options are either technical terms from different fields or incorrect variations.

This tests knowledge of email protocols. IMAP (Internet Message Access Protocol) is a standard email retrieval protocol that allows clients to access messages stored on a server. The other options either refer to different protocols or unrelated technical concepts.

This tests knowledge of mobile data technologies. HSUPA (High Speed Uplink Packet Access) is a mobile telephony protocol that enhances uplink data speeds. The key is distinguishing between 'Uplink' and similar-sounding terms like 'Upload' or 'Updata'.

GPRS (General Packet Radio Service) is a mobile data standard that enables packet-switched data transmission over GSM networks. The name accurately describes its function: it's a radio service that transmits data in packets rather than circuit-switched mode.

AMOLED (Active Matrix Organic Light Emitting Diode) is a display technology where each pixel is actively controlled by a transistor matrix, and organic compounds emit light when electrically stimulated. The 'active matrix' distinguishes it from passive matrix OLED displays.

Jaundice causes yellowing of the skin and the whites of the eyes due to elevated bilirubin levels in the blood. This occurs when the liver cannot process bilirubin properly, often due to liver disease or excessive red blood cell breakdown.