What is antimatter quizlet astronomy?

Antimatter is any particle with the same mass as a particle of ordinary matter but whose other basic properties, such as electrical charge, are precisely opposite. The particle-antiparticle pair annihilate each other causing it to be created and destroyed.

What is antimatter quizlet?

What is Antimatter? Antimatter is a molecules formed by atoms that consists of the same things that matter has, but the exact opposite. Antimatter is basically the same as matter, but qualities such as electric charge are opposite.

What is a Grand Unified Theory quizlet?

Grand Unified Theory (GUT) A theory that unifies three of the four fundamental forces (Strong, Weak, Electromagnetic [excluding gravity]) in a single model.

What happens when matter collides with antimatter quizlet?

What happens when matter and antimatter collide? They destroy each other. There was more matter than antimatter to start thus stars and galaxies.

What happened to all the anti matter?

This created a small surplus of matter, and as the universe cooled, all the antimatter was destroyed, or annihilated, by an equal amount of matter, leaving a tiny surplus of matter. And it is this surplus that makes up everything we see in the universe today.

Why is dark matter called dark matter?

Dark matter is called “dark” because it does not appear to interact with the electromagnetic field, which means it does not absorb, reflect, or emit electromagnetic radiation (like light) and is, therefore, difficult to detect.

What is the meaning of a closed universe quizlet?

What is the meaning of a “closed” universe? The universe will someday stop expanding and start to collapse. If the density of the universe is greater than the critical density this means that. the universe is expanding at a rate less than the escape speed of the universe.

What is Planck time quizlet?

The Planck time refers to. the first 10-43 second of time, when the universe had such high density that all known science fails to explain its behavior.

What is antimatter How were particles antiparticle pairs created and destroyed in the universe?

We believe that in the very early Universe, before the age of the universe was about 1 second old, particle-antiparticle pairs were created out of the radiation field, and then as soon as they were created, they mutually annihilated into radiation again.

What is meant by dark energy quizlet?

What is dark energy? (AKA cosmological constant) Dark energy is the name given to the mysterious force that counteracts the effects of gravity on larger scales, and leads to the acceleration in the universe’s expansion.

What is inflation astronomy quizlet?

What do we mean by inflation? a sudden and extremely rapid expansion of the universe that occurred in a tiny fraction of a second during the universe’s first second of existence.

Which forces would a grand unified theory GUT unify quizlet?

Grand Unified Theory: A theory that unifies three of the four fundamental forces 14the strong force, the weak force, and the electromagnetic force (but not gravity) 14in a single model. Planck: The era of the universe prior to the Planck time.

How does matter and antimatter differ?

Antimatter is identical to normal matter in almost every way. The only difference is electric charge, which is opposite for the two forms of matter. So there could be a whole galaxy made of antimatter out there and our telescopes wouldn’t see it any differently from a galaxy of normal matter.

What happens when matter and antimatter collide?

When matter and antimatter collide, the particles destroy each other, with a huge energy release. Depending on the colliding particles, not only is there a great energy release, but new, different particles may also be produced (such as neutrinos and various flavours of quark – see figure below).

When did the universe become visible?

The Universe became transparent to the light left over from the Big Bang when it was roughly 380,000 years old, and remained transparent to long-wavelength light thereafter.

What can antimatter do?

Antimatter-matter annihilations have the potential to release a huge amount of energy. A gram of antimatter could produce an explosion the size of a nuclear bomb. However, humans have produced only a minuscule amount of antimatter.

How do we get antimatter in real life?

Making antimatter Today, antimatter is primarily found in cosmic rays – extraterrestrial high-energy particles that form new particles as they zip into the Earth’s atmosphere. It also appears when scientists smash together particles boosted to high energies in machines called accelerators.

Is antimatter the same as dark matter?

Is there any difference between antimatter, dark matter, dark energy, and degenerate matter? Yes. Although the names sound vague and almost fictional, the types of matter called antimatter, dark matter, dark energy, and degenerate matter are all different, specific entities that really exist in our universe.

What does dark matter do to the human body?

The nuclear forces that hold your nuclei and protons together would vanish; the electromagnetic forces that caused atoms and molecules to stay together (and light to interact with you) would disappear; your cells and organs and entire body would cease to hold together.

Can you touch dark matter?

When we look out into the universe, we don’t know what we’re looking at for the most part. In fact, we can’t even see most of what we’re looking at – that’s because the majority of the universe is made up of mysterious, practically invisible dark matter.

What causes dark energy?

Dark energy is caused by energy inherent to the fabric of space itself, and as the Universe expands, it’s the energy density — the energy-per-unit-volume — that remains constant. As a result, a Universe filled with dark energy will see its expansion rate remain constant, rather than drop at all.

What will happen if the universe is open?

What will happen to an open universe? An open universe will expand forever and as it does, matter will spread thinner and thinner. Eventually, galaxies will runout of material to make new stars and already existing stars wil slowly extinguish. The universe will have a dark, cold death.

What is the meaning of a closed universe?

(in cosmology) a hypothetical expanding universe that contains sufficient matter to reverse the observed expansion through its gravitational contraction.

Do we live in a flat universe quizlet?

No, Cosmologists have concluded that galaxies remain approximately in their respective positions and are carried further away from each other as the space between them expands.

What is a difference between dark matter and dark energy?

Dark matter makes up most of the mass of galaxies and galaxy clusters, and is responsible for the way galaxies are organized on grand scales. Dark energy, meanwhile, is the name we give the mysterious influence driving the accelerated expansion of the universe.

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