Questions & Answers
Browse all 18 questions from the
Junior Physics Frontiers study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
What is the smallest known particle that makes up protons and neutrons?
-
A
Quark
-
B
Electron
-
C
Atom
-
D
Molecule
2
Which force keeps planets orbiting around the Sun?
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A
Magnetism
-
B
Gravity
-
C
Friction
-
D
Electricity
3
What is the name of the particle that carries light energy?
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A
Proton
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B
Neutron
-
C
Photon
-
D
Electron
4
At the very center of an atom, what is the heavy core called?
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A
Shell
-
B
Nucleus
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C
Cloud
-
D
Orbit
5
Which state of matter exists at extremely high temperatures where electrons are stripped from atoms?
-
A
Solid
-
B
Liquid
-
C
Gas
-
D
Plasma
6
What do we call the phenomenon where light bends when it enters a new material like water?
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A
Reflection
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B
Refraction
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C
Absorption
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D
Radiation
7
Which fundamental force is responsible for holding the nucleus of an atom together?
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A
Strong Nuclear Force
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B
Weak Nuclear Force
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C
Gravity
-
D
Electromagnetism
8
What is the name of the constant speed at which all light travels in a vacuum?
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A
Sound speed
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B
Light speed
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C
Terminal velocity
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D
Escape velocity
9
Which subatomic particle has a negative electrical charge?
-
A
Proton
-
B
Neutron
-
C
Electron
-
D
Quark
10
What is the term for a material that allows electricity to flow through it easily?
-
A
Insulator
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B
Conductor
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C
Resistor
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D
Capacitor
11
According to physics, what happens to time as you move closer to the speed of light?
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A
It speeds up
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B
It stops
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C
It stays the same
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D
It slows down
12
What is the measure of the amount of matter in an object?
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A
Weight
-
B
Mass
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C
Volume
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D
Density
13
Which particle in an atom has no electrical charge?
-
A
Proton
-
B
Electron
-
C
Neutron
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D
Ion
14
What is the primary source of energy for our Sun?
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A
Chemical combustion
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B
Nuclear fusion
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C
Friction
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D
Gravity
15
What is the name of the invisible field that exerts force on moving charged particles?
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A
Magnetic field
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B
Thermal field
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C
Solid field
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D
Fluid field
16
What do physicists call the smallest possible unit of energy?
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A
Atom
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B
Quanta
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C
Molecule
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D
Cell
17
What is the scientific term for the total energy of motion of particles in an object?
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A
Temperature
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B
Heat
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C
Gravity
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D
Density
18
Which type of radiation consists of high-energy electromagnetic waves with the shortest wavelengths?
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A
Radio waves
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B
Visible light
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C
Gamma rays
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D
Infrared
