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Main Subjects MCQs With Answers
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Why does ice float on water instead of sinking?
AIce is warmer than water
BIce contains only air bubbles
CIce is less dense than liquid water
DIce has a different chemical formula
Which instrument is used to measure atmospheric pressure?
AAnemometer
BThermometer
CHygrometer
DBarometer
Which instrument is used to measure humidity in the air?
ASeismograph
BAnemometer
CHygrometer
DBarometer
Which instrument is used to measure wind speed?
AHygrometer
BAnemometer
CThermometer
DBarometer
Sound waves are unable to travel through which of the following?
AAir
BSteel
CA vacuum
DWater
What is the approximate speed of light in a vacuum?
A300,000 km per second
B300,000 km per hour
C3,000 km per second
D30,000 km per second
What causes a rainbow to appear in the sky?
ADispersion and refraction of sunlight through water droplets
BAbsorption of light by clouds
CReflection of light only
DScattering of light by dust particles
According to Newton’s First Law of Motion, an object at rest stays at rest unless acted upon by what?
AGravity only
BIts own mass
CFriction alone
DAn unbalanced external force