Questions & Answers
Browse all 20 questions from the
Physical Science Essentials study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
Which fundamental force is responsible for the radioactive decay of atomic nuclei?
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A
Strong nuclear force
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B
Weak nuclear force
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C
Electromagnetic force
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D
Gravitational force
2
What is the term for the process by which a solid transitions directly into a gas without passing through the liquid phase?
-
A
Condensation
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B
Evaporation
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C
Sublimation
-
D
Deposition
3
In thermodynamics, what does the Second Law state regarding entropy in an isolated system?
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A
It remains constant
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B
It decreases over time
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C
It increases over time
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D
It is always zero
4
Which subatomic particle has a mass approximately 1836 times greater than that of an electron?
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A
Neutron
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B
Photon
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C
Muon
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D
Neutrino
5
According to the Heisenberg Uncertainty Principle, which pair of variables cannot be simultaneously measured with absolute precision?
-
A
Mass and velocity
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B
Position and momentum
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C
Energy and time
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D
Force and acceleration
6
What is the correct order of the electromagnetic spectrum from lowest to highest frequency?
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A
Radio, Infrared, Visible, X-ray
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B
Gamma, Ultraviolet, Visible, Radio
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C
Radio, Microwave, X-ray, Infrared
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D
X-ray, Visible, Infrared, Radio
7
Which scientist is credited with discovering the principle of buoyancy while in a bathtub?
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A
Isaac Newton
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B
Galileo Galilei
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C
Archimedes
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D
Blaise Pascal
8
What is the chemical property that describes an atom's ability to attract a shared pair of electrons in a covalent bond?
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A
Ionization energy
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B
Electronegativity
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C
Electron affinity
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D
Valency
9
In special relativity, what happens to an object's mass as its velocity approaches the speed of light?
-
A
It remains constant
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B
It decreases
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C
It increases
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D
It reaches zero
10
What is the primary constituent of the Earth's atmosphere by volume?
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A
Oxygen
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B
Carbon Dioxide
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C
Argon
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D
Nitrogen
11
What type of lens is required to correct myopia (nearsightedness)?
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A
Concave
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B
Convex
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C
Cylindrical
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D
Bifocal
12
Which temperature scale is defined such that absolute zero is 0 degrees?
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A
Celsius
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B
Fahrenheit
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C
Kelvin
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D
Rankine
13
What is the unit of measure for electrical resistance?
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A
Volt
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B
Ampere
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C
Ohm
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D
Watt
14
Which element has the highest melting point of all pure chemical elements?
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A
Tungsten
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B
Carbon
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C
Platinum
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D
Osmium
15
What phenomenon causes light to bend as it passes from one medium to another of different density?
-
A
Reflection
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B
Diffraction
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C
Refraction
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D
Polarization
16
What is the most abundant element in the observable universe?
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A
Helium
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B
Oxygen
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C
Hydrogen
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D
Carbon
17
Which law states that the force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them?
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A
Ohm's Law
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B
Coulomb's Law
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C
Faraday's Law
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D
Gauss's Law
18
What is the molecular geometry of a methane molecule (CH4)?
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A
Linear
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B
Bent
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C
Tetrahedral
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D
Trigonal planar
19
Which particle is responsible for carrying the electromagnetic force?
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A
Gluon
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B
Graviton
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C
Photon
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D
W boson
20
In a vacuum, do all objects fall with the same acceleration regardless of their mass?
-
A
Yes
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B
No, heavier objects fall faster
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C
No, lighter objects fall faster
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D
Only if they are spherical
