General Science Quiz: Biology and Astronomy

Gerontology is the multidisciplinary study of aging, including biological, psychological, and social aspects of growing old. The term comes from Greek 'geron' (old man). It is unrelated to ichthyology (fish), aesthetics, or environmental pollution studies.

Hygiastics is the science or study of health and hygiene practices. It derives from 'Hygieia,' the Greek goddess of health. This field focuses on cleanliness, sanitation, and disease prevention, unlike agriculture, aging studies, or aesthetics.

Hygrology is the study of humidity and moisture in the atmosphere. The prefix 'hygro-' relates to moisture or water (as in hygrometer). This is distinct from ichthyology (fish), hypnology (sleep), or general health studies.

Idiopsychology (misspelled in the prompt) refers to the study of one's own psychology or the psychology of an individual's own mind.

Kalology is the study of facial beauty and the ways in which beauty influences human society. It is derived from the Greek word 'kalos' meaning beautiful.

The Andromeda Galaxy (historically called the Andromeda Nebula) contains approximately 1 trillion (10^12) stars. This makes it comparable to or slightly larger than our Milky Way. 100 billion (10^11) is the correct order of magnitude for a large spiral galaxy.

Earth is approximately 4.5 billion years old based on radiometric dating of meteorites and Earth's oldest rocks. Option D at 5 billion years is the closest to this scientific consensus among the given choices. The other options are orders of magnitude too young.

The main asteroid belt lies between Mars and Jupiter, containing millions of rocky objects. While some asteroids exist elsewhere (like near-Earth asteroids or Trojans), the vast majority orbit in this specific region between the two planets.

The Sun orbits the galactic center at approximately 220-230 km/s, which converts to about 150 miles/second. This orbital motion takes roughly 225-250 million years to complete one full revolution around the Milky Way galaxy.

Because spacecraft travel time takes months or years and planets move continuously along their orbits, you must aim where the planet will be when the spacecraft arrives. This is called 'leading the target' - similar to shooting a moving object in hunting.

The five traditional human senses are sight (vision), taste (gustation), hearing (audition), smell (olfaction), and touch (tactile). Crying is an emotional response and physical secretion, not a sensory modality.

Children have 20 primary teeth that erupt during early childhood and begin falling out around age 6-7, replaced by permanent teeth. The other options are incorrect: 30 is close to adult tooth count, while 18 and 10 are too few.

The human body is approximately 60-70% water by weight, with 70% being the commonly cited average for adults. Water is essential for cellular functions, temperature regulation, and biochemical processes. 95% is more characteristic of jellyfish, while 50% and 30% are too low for humans.

The average human heart beats approximately 100,000 times per day, based on a normal resting heart rate of 60-100 beats per minute. 1,000,000 is too high, 50,000 is too low, and 5,000 is far below actual physiological rates.