Physics Terms

Given the description, name the term in particle physics.

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Last updated: October 21, 2020

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First submitted	October 20, 2020
Times taken	41
Average score	45.0%
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Description	Answer
A particle with mass, made up of smaller units called quarks that are bound together. Protons and neutrons are types of them.	Hadron
A machine used to speed up streams of particles in a define direction at high speeds.	Particle Accelerator
An accelerator in which two beams traveling in opposite directions are steered together to induce high-energy impacts between particles in one beam and those in the other.	Collider
The particle which gives matter its mass. The LHC should confirm whether it exists.	Higgs Boson
Invisible matter that scientists believe makes up some 25 percent of the universe and whose presumed existence accounts for how the trajectories through of visible stars and galaxies are bent.	Dark Matter
A mysterious, invisible material that has an anti-gravitational power believed to be powering the acceleration of the expansion of the universe, of which it makes up 70 percent.	Dark Energy
A particle of 2 protons and 2 neutrons that is emitted by an unstable radioactive nucleus during radioactive decay. It is a relatively low-penetration particle due to its comparatively low energy and high mass.	Alpha Particle
A measure of the mometum of a body in rotational motion about its center of mass.	Angular Momentum
High-energy, high-speed electrons or positrons emitted by some types of radioactive decay. The particles emitted are a form of ionizing radiation.	Beta Particle
One possible scenario for the ultimate fate of the universe, in which the gravity of the matter in the universe will one day halt and reverse the universe's expansion causing it to collapse into a black hole singularity.	Big Crunch

Description	Answer
An idealized object that absorbs all electromagnetic radiation that falls on it, without passing through and without reflection. The radiation emitted from its body is mostly infrared light, but varies due to temperature.	Black Body
The idea in quantum theory that items can be separatley analyzed as having several contradictory and exclusive properties.	Complementarity
High speed, energetic particles originating from space that impinges on Earth's atmosphere. Some are generated by supernovas.	Cosmic Rays
The phenomenon in quantum theory whereby particles that interact with each other become dependent on each other's quantum states and properties.	Entanglement
A measure of the disorder of a system and of its constituent molecules. More specifically, in thermodynamics it is a measure of the unavailability of a system's energy to do work.	Entropy
A one-way boundary in space-time surrounding a black hole. Any matter or light that falls through this can never leave, and any event inside it cannot affect an outside observer.	Event Horizon
The hypothesis that life on Earth was transferred from elsewhere in the universe.	Exogenesis
Law that states that the redshift in light coming from distant galaxies is proportional to their distance.	Hubble's Law
A hypothetical particle that is a magnet with only one pole, and which therefore has a net magnetic charge.	Magnetic Monopole
A sub-atomic elementary paticle with no electrical charge and very small mess that travels very close to the speed of light. They are created as a result of types of radioactive decay or nuclear reaction.	Neutrino

4 Comments

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Level 70

Oct 20, 2020

There are some mistakes there:

-electrons are not hadrons, but neutrons are. You should replace "protons and electrons" with "protons and neutrons"

-the Higgs boson is more than theoretical: its existence was confirmed in 2012.

-The question about angular pomentum is really tricky, because given the surrounding questions being almost exclusively about particle physics, the natural answer would be "spin" (although I'd agree it's less correct). Perhaps you should rename your quiz to "particle physics and some general relativity"

-quantum entanglement is not permanent unlike what your question says.

-you should accept "panspermia" for exogenesis. I understand the latter is technically more appropriate but I have never heard it used that way, only panspermia.

Other than that everything looks fine to me, but perhaps you could accept "particle collider" or "hadron collider" for just "collider", or make it so that anything that ends in "collider" gets accepted

Level 55

Oct 21, 2020

The first mistake is a typo, the others are stuff I wouldn't have known better if you had not have commented. Thank you, I just paraphrased some glossary terms on a website so I just took to definitions as granted lol.

Level 73

Oct 21, 2020

a little bit more time would be nice

Level 55

Oct 21, 2020

You are right, my bad.