Everyday Science
Everyday Science MCQs With Answers
741 Everyday Science MCQs for CSS, PPSC, FPSC, NTS and entry-test preparation. Take a scored quiz instead →
What is a key factor that determines how strongly a magnetic material is attracted to a magnet, aside from the strength of the magnet itself?
AThe temperature of the room only
BThe distance between the material and the magnet
CThe color of the material
DThe material's electrical charge
Formalin, a solution containing formaldehyde, is commonly used for what purpose in laboratories and medical settings?
ATo preserve biological specimens and tissue samples
BAs a food sweetener
CAs a fuel source
DAs a fertilizer
What is the primary cause of Earth’s seasons throughout the year?
AEarth's changing distance from the sun
BThe tilt of Earth's rotational axis
CVariations in the sun's brightness
DThe moon's gravitational pull
What branch of chemistry is primarily concerned with the study of carbon-containing compounds?
AInorganic chemistry
BPhysical chemistry
COrganic chemistry
DAnalytical chemistry
How do carbon dioxide fire extinguishers work to put out flames?
ABy displacing the oxygen surrounding the fire, cutting off its fuel supply
BBy adding more fuel to burn the fire out quickly
CBy cooling the fire with extremely cold water
DBy chemically converting the fire into smoke
Why do stars appear to twinkle when viewed from Earth’s surface?
AStars physically flicker on and off
BHuman eyes cannot properly focus on distant light
CStarlight bends as it passes through Earth's constantly moving atmosphere
DStars are actually much closer than they appear
What term describes compounds made up entirely of hydrogen and carbon atoms, such as those found in fuels like petrol and natural gas?
ACarbohydrates
BHalides
CHydrocarbons
DAmino acids
What term describes a chemical reaction that releases heat energy into its surroundings, such as combustion?
AExothermic reaction
BEndothermic reaction
CNeutralization reaction only
DCatalytic reaction only
What is the approximate acceleration due to gravity near Earth’s surface?
A22 meters per second squared
B9.8 meters per second squared
C1.6 meters per second squared
D100 meters per second squared
What causes the loud noise known as a sonic boom?
AAn object traveling faster than the speed of sound
BTwo clouds colliding
CAn object suddenly stopping completely
DA sudden drop in air pressure