General Science Quiz

The correct answer is C (Caves). Speleology is the scientific study and exploration of caves and cave systems. The other options are incorrect: mineral deposits are studied by mineralogists, trees by botanists/dendrologists, and mountains by geologists/orologists.

The correct answer is C (Spinal chord). The dura mater and pia mater are two of the three meningeal membranes that protect the brain and spinal cord. The question uses the slightly informal term 'Spinal chord' rather than the more precise 'spinal cord,' but the intent is clear.

Earth's rotation creates time zones, so different locations experience different dates simultaneously. When it's midnight on April 1st in one timezone, it can already be April 2nd in timezones to the east, while still March 31st to the west. This occurs because each timezone's date changes at midnight local time, and the International Date Line marks where the date changes by a full day.

Jupiter's four largest moons, Io, Europa, Ganymede, and Callisto, are collectively called the Galilean Moons. They were discovered by Galileo Galilei in 1610 and were the first moons discovered orbiting a planet other than Earth. Ganymede is actually the largest moon in our solar system, even larger than Mercury.

White blood cells (leukocytes) are the immune system's primary defense cells. They identify and neutralize pathogens like bacteria, viruses, and foreign substances. White blood cells include lymphocytes (T cells and B cells), macrophages, and neutrophils, each playing different roles in protecting the body from infections and diseases. Red blood cells carry oxygen, platelets help with clotting, and nerve cells transmit signals.

A hectare is a metric unit of area equal to 10,000 square meters. In imperial units, 1 hectare ≈ 2.47 acres. The conversion commonly used is 1 hectare ≈ 2.5 acres for rough calculations. This makes 2.5 acres the closest correct answer. Hectares are widely used in land measurement internationally, especially in agriculture and real estate.

Absolute zero is the lowest possible temperature, defined as 0 Kelvin (or -273.15°C and -459.67°F). At absolute zero, all thermal motion ceases theoretically. Kelvin is the absolute temperature scale where 0 K represents absolute zero.

The ozone layer is located in the stratosphere, approximately 10-50 kilometers above Earth's surface. It absorbs harmful ultraviolet radiation from the sun. The troposphere is the lowest layer, thermosphere is higher, and lithosphere is Earth's crust.

JCL (Job Control Language) is indeed a scripting language used on IBM mainframe operating systems (like z/OS) to instruct the system on how to run batch jobs. It defines the job's steps, resources needed, and execution parameters.

The mandible (lower jaw bone) is the only movable bone in the human skull. All other cranial bones are fixed through sutures (fibrous joints), while the mandible connects to the skull via the temporomandibular joint, allowing movement for chewing and speaking.

Sound waves are longitudinal waves where particles vibrate parallel to the direction of wave propagation. Light waves are transverse electromagnetic waves where oscillations occur perpendicular to the direction of propagation.

Sound travels fastest in solids because particles are closely packed, allowing faster transmission of vibrations. Speed of sound decreases from solids (6000 m/s in steel) to liquids (1500 m/s in water) to gases (~343 m/s in air). Sound cannot travel in vacuum.

Protium is the hydrogen isotope with no neutrons - it consists of just one proton and one electron (¹H). Deuterium has 1 neutron, and Tritium has 2 neutrons. The option claiming 'all isotopes contain atleast 1 neutron' is false.

Air has a refractive index very close to 1, typically 1.0003 at standard temperature and pressure. This means light travels only slightly slower in air than in a vacuum. The value 1.33 is for water, 1.6 for some glass, and 2.33 for some diamond-like materials.

Vitamin B1 is chemically known as thiamine. Beriberi is indeed caused by thiamine (vitamin B1) deficiency. L-ascorbic acid is vitamin C, cobalamin is vitamin B12. This is a basic biochemistry/nutrition question testing vitamin names and their deficiency diseases.

When you face a rainbow, the sun is always behind you. Rainbows form when sunlight is refracted and reflected in raindrops in front of you while the sun shines from behind, creating the visible spectrum at an angle of approximately 42 degrees from the antisolar point.

The appendix has traditionally been considered a vestigial organ with no significant function in humans, though recent research suggests possible roles in maintaining gut flora. The other organs listed, spleen, liver, and gall bladder, all have well-established essential functions in digestion, immunity, and blood filtration.

Proxima Centauri is the closest known star to Earth at approximately 4.24 light-years away. It is part of the Alpha Centauri triple star system and is a red dwarf star, making it dimmer than the other options despite its proximity.

The mean free path is the average distance a molecule or atom travels between successive collisions with other particles. This concept is fundamental in kinetic theory of gases and helps explain properties like viscosity, thermal conductivity, and diffusion rates.

The spleen is called the 'blood bank' of the human body because it stores red blood cells and platelets, releasing them during emergencies like hemorrhage or shock. The spleen also filters old or damaged blood cells and plays a role in immune function.