General Science and Facts Quiz

Chewing gum encourages breathing through your mouth rather than your nose, which reduces the amount of irritating onion vapor that reaches your nasal receptors. The tear-inducing effect comes from sulfur compounds released when onion cells are damaged, and mouth breathing bypasses the nasal passages where these compounds are detected.

A red blood cell typically takes about 20 seconds to complete one full circulation through the human body under normal resting conditions. This remarkable speed allows efficient oxygen delivery to tissues and carbon dioxide removal. The actual time can vary based on heart rate, blood pressure, and individual physiology.

The cornea is the only part of the human body that has no direct blood supply. It receives oxygen and nutrients through diffusion from tears and the aqueous humor (fluid behind it), while waste products diffuse out. This avascular property is crucial for maintaining corneal transparency, which is essential for clear vision.

Challenger Deep, located in the southern end of the Mariana Trench in the Pacific Ocean, is the deepest known point in Earth's oceans at approximately 10,928 meters (35,853 feet) below sea level. It was first reached by Jacques Piccard and Don Walsh in 1960 and has been the site of several subsequent expeditions.

Men and women blink at approximately the same rate, averaging about 15-20 times per minute. Blinking frequency is influenced by factors like concentration, dry eye conditions, screen time, and individual habits, not by gender. The claim that men blink twice as much as women has no scientific basis.

Ronald Ross, a British medical doctor, discovered in 1897 that malaria is transmitted by female Anopheles mosquitoes. His work in India proved that the malaria parasite (Plasmodium) completes part of its life cycle in mosquitoes and is transmitted to humans through mosquito bites, earning him the 1902 Nobel Prize in Medicine.

Giant pandas in captivity typically live 20-30 years, with 25 being a reasonable average lifespan. Wild pandas generally have shorter lifespans (around 15-20 years) due to harsher conditions. The oldest recorded panda lived to 34 years. The 25-year figure represents a good estimate for captive pandas with proper care.

The average distance from the Earth's center to the Moon's center is approximately 384,400 km. The given value 384,402 km represents this average distance reasonably well. The Moon's orbit is elliptical, so actual distance varies between about 363,300 km (perigee) and 405,500 km (apogee), but the average is around 384,400 km.

SNDT Women's University (Shreemati Nathibai Damodar Thackersey Women's University) in Mumbai is India's oldest and only university exclusively for women that is also run by women. It was established in 1916.