General Science Quiz

For an object to be invisible, it would need to reflect nearly 100% of light falling on it (or absorb and re-emit it perfectly), making it undetectable to the human eye. 85% reflection is insufficient, and traveling at high speed doesn't make things invisible.

Capillary action allows water to rise against gravity through narrow spaces. This explains how water can emerge from mountain tops even when the groundwater level is below - it moves upward through porous rock and soil via capillary rise.

SHM stands for Simple Harmonic Motion, a type of periodic motion where the restoring force is directly proportional to the displacement. The other options are made up phrases.

When a vehicle turns at high speed, the centrifugal force (the apparent outward force in a rotating reference frame) is responsible for accidents or skidding. Centripetal force is the inward force that keeps the vehicle on the curved path.

According to relativity, as an object approaches the speed of light, time dilation occurs - time passes slower for the moving object relative to a stationary observer. The phrasing 'control time constraint' is awkward but refers to this relativistic time effect. Objects don't disappear or lose mass simply by moving at light speed.

The gravitational acceleration on the Moon's surface is approximately 1.62 m/s², which is about 1/6th of Earth's gravitational acceleration (9.8 m/s²). This is why astronauts weigh much less on the Moon and can bounce around easily.

Objects float due to buoyant force - an upward force exerted by fluids that opposes the weight of an immersed object. This force is equal to the weight of the fluid displaced by the object (Archimedes' principle). The spelling 'bounacy' is a typo for 'buoyancy'.

Alligators can survive winter by entering a state of dormancy where they can freeze their heads in ice while keeping their nostrils above the surface to breathe. This remarkable adaptation allows them to endure cold temperatures by reducing their metabolic rate. The other options ('summer', 'boredom', 'hunter') are contextually inappropriate - alligators don't need to survive summer (they're active then), and 'boredom' and 'hunter' are abstract nouns, not seasons.

The ostrich is the biggest bird in the world, capable of growing up to 9 feet tall, far larger than the emu which reaches about 6 feet. Ostriches are native to Africa and are flightless but incredibly fast runners. The emu, while also large, is Australia's largest bird but is significantly smaller than the ostrich.

Honeybees indeed have hair on their eyes, which may seem surprising but serves an important function - these tiny hairs help detect wind direction and air flow, crucial for navigation during flight. This is one of many specialized adaptations that make bees efficient pollinators. Other options are incorrect: while bees have hair on their bodies for pollen collection, their eyes specifically feature this sensory adaptation.

Antarctica is the only continent without native reptile or snake species due to its extreme cold climate. Reptiles are cold-blooded (ectothermic) and cannot survive in Antarctica's freezing temperatures. Other continents like Asia, Europe, and all others have reptile populations adapted to their climates.

Cats prefer their food at body temperature or slightly warmer (around 86-100°F), similar to the temperature of fresh prey. Their natural instinct is to eat warm food, and cold or frozen food is less appealing to them. The option 86°F falls within this preferred warm range.

Approximately 1 in 5,000 North Atlantic lobsters are born bright blue due to a genetic mutation that causes excessive production of a certain protein. Most lobsters have the typical greenish-brown or reddish coloration. The blue color variant is a rare but natural occurrence.

Worker ants typically live for several months to a few years (up to about 5 years for some species), while queen ants can live for decades (up to 25-30 years depending on the species). The queen's much longer lifespan allows her to continuously reproduce and sustain the colony throughout her life.

Some ribbon worm species will consume themselves (auto-cannibalism) when they cannot find food elsewhere. This extreme survival behavior allows them to sustain themselves temporarily by absorbing their own body tissues. It's a last-resort mechanism when facing starvation.

Giant pandas are highly specialized herbivores with bamboo comprising approximately 99% of their diet. They rarely eat anything else in the wild - occasionally small rodents or other vegetation, but bamboo is their primary and almost exclusive food source. They have evolved specialized adaptations to digest bamboo.

Leeches have 32 segmental ganglia (clusters of nerve cells) along their body, which are often referred to as 32 brains. Each segment has its own neural center that can function independently. This distributed nervous system allows leeches to coordinate movement and respond to stimuli across their body segments.

Dr. Vikram Sarabhai is widely regarded as the father of the Indian Space Program, making option C correct. He founded ISRO's predecessor, INCOSPAR, in 1962.

IRS (Indian Remote Sensing) is ISRO's satellite program for earth observation and resource management. These satellites provide data for agriculture, drought monitoring, and disaster management. The other options are incorrect - IRS is not related to rocket services, radiation satellites, or revenue services.