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Main Subjects MCQs With Answers
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The Milky Way is the name given to what large astronomical structure?
AA moon of Jupiter
BA type of nebula
CA single very bright star
DThe galaxy that contains our solar system
What term describes a region in space where gravity is so extremely strong that nothing, not even light, can escape from within it?
AA black hole
BA supernova
CAn asteroid
DA nebula
The asteroid belt, a region containing a large number of small rocky bodies, is located between which two planets?
AVenus and Earth
BJupiter and Saturn
CMars and Jupiter
DEarth and Mars
A comet, an icy body that orbits the sun, becomes visible with a distinctive glowing tail primarily due to what process?
AHeating from the sun causing ice and dust to vaporize and stream away from its core
BReflecting light from other planets only
CColliding with other comets
DGenerating its own internal light source
The Big Bang theory is the leading scientific explanation for what significant astronomical event or process?
AThe extinction of the dinosaurs
BThe formation of Earth's moon
CThe origin and subsequent expansion of the universe
DThe formation of Earth's atmosphere
What is the SI base unit used to measure mass?
ANewton
BKilogram
CPound
DGram
In physics, momentum is calculated by multiplying an object’s mass by which other physical quantity?
AIts density
BIts electrical charge
CIts temperature
DIts velocity
According to the law of conservation of momentum, what happens to the total momentum of a closed system of interacting objects, such as during a collision, when no significant external forces act on it?
AIt is always completely lost
BIt remains constant overall, even though it may be redistributed between the objects
CIt always increases significantly
DIt converts entirely into heat energy
The lacrimal glands, located near the eyes, are primarily responsible for producing what substance?
ASweat
BEarwax
CSaliva
DTears
What term describes the growing phenomenon in which certain bacteria evolve mechanisms allowing them to survive exposure to antibiotics that would previously have killed them?
AVaccination
BPasteurization only
CHerd immunity
DAntibiotic resistance