Tag: science & technology

Meteor showers occur when Earth passes through trails of dust and debris left by comets. As these particles enter Earth's atmosphere at high speeds, they burn up due to friction, creating streaks of light. They're not actual stars (falling or shooting stars) but are small particles from cometary debris.

The Autonomic Nervous System (ANS) controls involuntary processes like breathing, digestion, heart rate, and glandular secretion. The Sympathetic and Parasympathetic systems are subdivisions of the ANS that regulate 'fight or flight' and 'rest and digest' responses respectively, but the broader category is the Autonomic Nervous System.

The Soviet Union (USSR) was the first country to send a woman into space. Valentina Tereshkova became the first woman in space on June 16, 1963, aboard Vostok 6. This achievement occurred 20 years before Sally Ride became the first American woman in space in 1983.

The Sun is a star - specifically a G-type main-sequence star (yellow dwarf). Option C is correct. It is not a planet (A), not a satellite (B), and since it IS a star, D ('None of the above') is incorrect.

The Sun produces energy through nuclear fusion - specifically hydrogen nuclei fusing into helium in its core. Option B is correct. Nuclear fission (A) is splitting atoms, not what powers stars. Endothermic (C) and adiabatic (D) are thermodynamic terms, not reaction types.

The Sun's gravitational pull is indeed what holds all planets, asteroids, and comets in orbit, maintaining the solar system's structure. This is a fundamental principle of celestial mechanics.

Sunlight takes approximately 8.5 minutes to reach Earth, traveling at the speed of light across about 150 million km. Options A (6 min), B (7 min), and C (7.5 min) are all too short.

The Sun's core temperature where nuclear fusion occurs is approximately 27 million degrees Fahrenheit. Option A (5777 K) is the Sun's surface temperature. Option B (6000°C) is also surface temperature. Option D (16 million°C) is close but the exact figure in Fahrenheit is 27 million.

Anatomy is the biological science concerned with the structure and organization of living things - it studies the physical structure of animals and plants, including their systems, organs, and tissues. Physiology (option B) studies functioning, not structure. Ethology (option C) studies animal behavior. Cytology and histology (option D) focus specifically on cells and tissues, which are subsets of anatomy. The question correctly identifies A.

Philology is the study of language in oral and written historical sources - it encompasses the study of literary texts, language history, and linguistic evolution. Options A (osteology) and B (myology) study bones and muscles respectively. Option C has a typo ('arcitecture') and refers to architecture. Only option D correctly identifies philology as the study of languages.