Study HubHubPage 17/114Scan verified MCQs with the answer highlighted, then open explanations when you want the reasoning.
Read Mode
Fingerprint Identification
Who is known as the father of fingerprints?
Sir Francis Galton is known as the 'father of fingerprints' because he was the first to study fingerprints scientifically and establish their uniqueness and permanence, laying the foundation for fingerprint identification.
Read Mode
Solar Structure
How many layers does the Sun have?
The Sun has six main layers: the core, radiative zone, convective zone, photosphere, chromosphere, and corona. Therefore, the correct answer is 6 layers.
Read Mode
Optics
A camera uses a _________ to form an image.
A camera uses a convex lens to converge light rays and form a clear image on the film or sensor. Convex lenses are converging lenses, which are essential for focusing light to create sharp images.
Read Mode
Space / Heliosphere
__________ is the point in the solar system at which pressure from the solar wind is equal to the opposing pressure of the interstellar medium.
The heliopause is the boundary in the solar system where the solar wind's pressure balances the pressure from the interstellar medium, marking the outer edge of the heliosphere.
Read Mode
Space Missions
NASA’s _____ is currently studying the sun up close.
NASA's Parker Solar Probe is the spacecraft currently studying the sun up close, designed to gather data about the sun's outer atmosphere and solar wind.
Read Mode
Solar Cycles
The sun has an ________ year solar cycle during which its activity increases and decreases.
The sun's solar cycle, known as the sunspot cycle, lasts approximately 11 years during which solar activity such as sunspots, solar flares, and solar radiation increases and decreases.
Read Mode
Cyborgs And Bionics
The term 'Cyborg', mostly used in science-fiction movies, describes:
The term 'cyborg' refers to a being with both organic and biomechatronic body parts, which includes humans aided by artificial means, bionic humans, and individuals with artificial parts. Therefore, all the options A, B, and C correctly describe aspects of a cyborg, making 'All of Above' the correct choice.
Read Mode
Human Eye And Vision
Long-sight defect can be corrected by using a ______ lens.
Long-sightedness (hypermetropia) occurs when the eye focuses images behind the retina. It is corrected using a convex lens, which converges light rays to focus correctly on the retina.
Read Mode
Elements In The Universe
The most abundant element in the universe is ________.
Hydrogen is the most abundant element in the universe, making up about 75% of its elemental mass. This is because hydrogen is the simplest and lightest element, formed in vast quantities after the Big Bang.
Read Mode
Astronomy
The Sun is a ________?
The Sun is a star because it is a massive, luminous sphere of plasma held together by gravity, producing energy through nuclear fusion at its core. It is not a planet, asteroid, or meteor, which are much smaller and do not produce their own light.