No Escape: The Truth About Black Holes
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Questions and Answers
- 1.
Is a Black Hole Really a Hole?Check the characteristics of a black hole.
- A.
Typically a collapsed star
- B.
Gravity is very strong
- C.
An enormous gap in the universe
Correct Answer(s)
A. Typically a collapsed star
B. Gravity is very strongExplanation
A black hole is typically a collapsed star, meaning it is formed from the remnants of a massive star that has undergone gravitational collapse. The gravity of a black hole is incredibly strong, so much so that nothing, not even light, can escape its gravitational pull. Therefore, the term "hole" is used metaphorically to describe the immense gravitational force and the resulting absence of light and matter within a black hole.Rate this question:
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- 2.
Is a Black Hole Really a Hole? Jets of GasJets of gas result from ______________ _______________ spiraling around the black hole's magnetic field.
Correct Answer(s)
charged particles
charge particleExplanation
Jets of gas result from charged particles spiraling around the black hole's magnetic field. These charged particles, which can be electrons or protons, are accelerated by the intense magnetic fields near the black hole. As they move in a spiral motion, they emit energy in the form of jets of gas. These jets can extend for thousands of light-years and are one of the ways black holes interact with their surroundings.Rate this question:
- 3.
Is a Black Hole Really a Hole? Accretion DiskMatter around the black hole ______________________ inward and forms an accretion disk.
Correct Answer(s)
spiral
spiralsExplanation
Matter around a black hole is pulled inward by its strong gravitational force and forms an accretion disk. This disk is often observed to have a spiral shape, hence the correct answer is "spiral, spirals". The matter in the accretion disk spirals towards the black hole before eventually being consumed by it.Rate this question:
- 4.
Is a Black Hole Really a Hole? Event HorizonAll matter that comes near a black hole will be ___________________ forever.
Correct Answer(s)
trapped
trapExplanation
All matter that comes near a black hole will be trapped forever. This is because a black hole has an extremely strong gravitational pull, which is so powerful that nothing, not even light, can escape its grasp. As matter gets closer to the black hole, it gets pulled in and compressed into an incredibly dense and compact region called the singularity. Once matter crosses the event horizon, it is trapped and cannot escape the gravitational pull of the black hole. Therefore, the correct answer is trapped.Rate this question:
- 5.
Is a Black Hole Really a Hole? Event HorizonThe Event ___________________ is the area around the black hole that captures matter.
Correct Answer(s)
Horizon
horizonExplanation
The event horizon is the boundary around a black hole beyond which nothing can escape, not even light. It is the point of no return, where the gravitational pull of the black hole becomes so strong that nothing can overcome it. Matter that crosses the event horizon is captured by the black hole and is unable to escape. Therefore, the event horizon is the area around the black hole that captures matter.Rate this question:
- 6.
Is a Black Hole Really a Hole? Event HorizonAll matter that travels into the Event Horizon is crushed to a single point. A _______________________ comprises the center, and the very essence, of the black hole.
Correct Answer(s)
singularity
SingularityExplanation
The correct answer is "singularity". A singularity is the center and essence of a black hole. It is a point of infinite density where all matter that enters the black hole's event horizon is crushed.Rate this question:
- 7.
NO ESCAPEWhat Do You Know About Black Holes?Check all the boxes that are FACTS.
- A.
The volume of a black hole is huge.
- B.
Black holes have no mass.
- C.
A rotating black hole may lie at the center of our galaxy, the Milky Way.
- D.
Gravity bends light.
- E.
Our Sun will eventually become a black hole.
- F.
Light cannot escape from a black hole.
- G.
Black holes will pull in everything in the universe and eventually destroy it.
- H.
NASA sent a space probe into a black hole.
- I.
The gravity of a black hole is felt everywhere.
- J.
The gravity that your body creates is felt everywhere.
- K.
Astronomers have evidence confirming that ordinary black holes are the gateway to worm holes.
Correct Answer(s)
C. A rotating black hole may lie at the center of our galaxy, the Milky Way.
D. Gravity bends light.
F. Light cannot escape from a black hole.
I. The gravity of a black hole is felt everywhere.
J. The gravity that your body creates is felt everywhere.Explanation
A rotating black hole may lie at the center of our galaxy, the Milky Way. This is a fact because scientists have observed evidence suggesting the presence of a supermassive black hole at the center of our galaxy.
Gravity bends light. This is a fact that has been proven through experiments and observations. When light passes through a gravitational field, its path is curved.
Light cannot escape from a black hole. This is a fact based on the understanding that black holes have such strong gravitational pull that nothing, not even light, can escape their grasp.
The gravity of a black hole is felt everywhere. This is a fact because gravity is a fundamental force that affects everything in its vicinity.
The gravity that your body creates is felt everywhere. This is a fact because every object with mass creates a gravitational field, no matter how small.Rate this question:
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- 8.
NO ESCAPEPathway to DiscoveryScientist who described gravity in 1687.
- A.
Sir Isaac Newton
- B.
John Michell
- C.
Albert Einstein
- D.
Sir Arthur Eddington
Correct Answer
A. Sir Isaac NewtonExplanation
Sir Isaac Newton is the correct answer because he is the scientist who described gravity in 1687. Newton's law of universal gravitation is one of the fundamental principles in physics, explaining the attraction between objects with mass. His work laid the foundation for our understanding of gravity and its role in the motion of celestial bodies, as well as everyday objects on Earth. Newton's contributions to science revolutionized our understanding of the physical world and his discoveries continue to be influential in modern physics.Rate this question:
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- 9.
NO ESCAPEPathway to DiscoveryUsed Einstein's Theory of General Relativity to define a black hole.
- A.
Subrahmanyan Chandrasekhar
- B.
John Michell
- C.
Karl Schwarzschild
- D.
Sir Arthur Eddington
Correct Answer
C. Karl SchwarzschildExplanation
Karl Schwarzschild used Einstein's Theory of General Relativity to define a black hole.Rate this question:
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- 10.
NO ESCAPEPathway to DiscoveryScientist who theory explained that white dwarfs eventually become neutron stars or black holes.
- A.
Subrahmanyan Chandrasekhar
- B.
John Michell
- C.
Karl Schwarzschild
- D.
Sir Arthur Eddington
Correct Answer
A. Subrahmanyan ChandrasekharExplanation
Subrahmanyan Chandrasekhar's theory explains that white dwarfs, which are the remnants of low-mass stars, can eventually become neutron stars or black holes. His work on the Chandrasekhar limit showed that when a white dwarf exceeds a certain mass, known as the Chandrasekhar mass, it will collapse under its own gravitational pull and transform into a neutron star or a black hole. This theory revolutionized our understanding of stellar evolution and the fate of massive stars, earning Chandrasekhar the Nobel Prize in Physics in 1983.Rate this question:
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- 11.
NO ESCAPEWhat type of Black Holes Are There?Stellar Black HolesThe pressure of the hot gas pushes out so that ______________ and ___________________ balance exactly.
Correct Answer
gravity pressure
pressure gravityExplanation
The correct answer is gravity pressure. In a stellar black hole, the pressure of the hot gas pushes outwards, while the force of gravity pulls inwards. These two forces balance each other exactly, creating a stable equilibrium.Rate this question:
- 12.
NO ESCAPEWhat type of Black Holes Are There?Stellar Black HolesAstronomers can _______________ that black holes exist, because of their interaction with companion stars.
Correct Answer
inferExplanation
Astronomers can infer that black holes exist because of their interaction with companion stars. By observing the gravitational effects of a companion star orbiting an invisible object, astronomers can deduce the presence of a black hole. The gravitational pull of the black hole causes the companion star to move in a predictable manner, providing evidence for the existence of the black hole.Rate this question:
- 13.
NO ESCAPEWhat type of Black Holes Are There?Supermassive Black HolesIn the summer, when you look in the direction of the constellation Sagittarius, you are looking toward the _______________ of our galaxy.
Correct Answer
centerExplanation
In the summer, when you look in the direction of the constellation Sagittarius, you are looking toward the center of our galaxy. This is because Sagittarius is located near the galactic center, where a supermassive black hole named Sagittarius A* resides. Supermassive black holes are the largest type of black holes and are found at the centers of most galaxies, including our own Milky Way.Rate this question:
- 14.
NO ESCAPEWhat type of Black Holes Are There?Supermassive Black HolesSupermassive black holes might be the result of the ___________________ of a dense cluster of stars.
Correct Answer
collapseExplanation
Supermassive black holes might be the result of the collapse of a dense cluster of stars. This means that when a cluster of stars becomes extremely dense, it can collapse under its own gravitational pull, forming a supermassive black hole. The collapse causes the stars to merge together, creating a massive concentration of mass that becomes a black hole. These supermassive black holes are much larger than stellar black holes, with masses that can be millions or even billions of times greater than our sun.Rate this question:
- 15.
NO ESCAPEWhat type of Black Holes Are There?Miniature Black HolesMiniature black holes probably formed between __________ to _________billion years ago.
Correct Answer
10 20
20 10Explanation
Miniature black holes are believed to have formed between 10 to 20 billion years ago. This range suggests that these black holes could have emerged relatively early in the universe's history. The formation of miniature black holes is thought to have occurred during the early stages of the Big Bang, when the universe was extremely dense and hot. These black holes are much smaller in size compared to other types of black holes, such as stellar or supermassive black holes.Rate this question:
- 16.
NO ESCAPEHubble Hunts Black HolesWFPC2Hubble's Wide Field and Planetary Camera 2 (WFPC2) was specially designed. It can record __________ images of very distant objects in relatively broad fields of view.
Correct Answer
sharpExplanation
The correct answer is "sharp". The explanation is that the WFPC2 camera on the Hubble telescope was designed to capture sharp images of very distant objects in broad fields of view. This means that it can capture clear and detailed images of faraway objects, allowing scientists to study them in greater detail.Rate this question:
- 17.
NO ESCAPEHubble Hunts Black HolesFOCThe detector intensifies the image and then records it — much like a video camera. Images of faint objects can be built up over longer _______________ times.
Correct Answer
exposureExplanation
The question is asking for an explanation of the term "exposure" in the context of the given statement. In photography, exposure refers to the amount of light that reaches the camera sensor or film. When taking images of faint objects, longer exposure times are required to capture enough light and build up a clear image. This means that the detector intensifies and records the image over a longer period, similar to how a video camera records footage.Rate this question:
- 18.
NO ESCAPEHubble Hunts Black HolesSTISHubble's Space Telescope Imaging Spectrograph (STIS) separates starlight into its component __________________ .
Correct Answer
color
colorsExplanation
The Hubble Space Telescope's Space Telescope Imaging Spectrograph (STIS) is able to separate starlight into its component colors. This means that it can analyze the different wavelengths of light emitted by stars and determine the specific colors present. By studying the colors of starlight, scientists can gain valuable insights into the properties and composition of stars, as well as detect the presence of certain elements or phenomena such as black holes.Rate this question:
- 19.
NO ESCAPEHubble Hunts Black HolesA Calculated EscapeAny projectile launched from Earth is slowed by interaction with the atmosphere. Most of this interaction is caused by ________________.
Correct Answer
frictionExplanation
The correct answer is friction. When a projectile is launched from Earth, it encounters the atmosphere which causes it to slow down due to the friction between the projectile and the air molecules. This frictional force acts in the opposite direction of the projectile's motion, reducing its speed and eventually bringing it to a stop. Therefore, the interaction with the atmosphere, specifically the friction between the projectile and the air, is the main cause of the slowing down of any object launched from Earth.Rate this question:
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Aug 07, 2024Quiz Edited by
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Mar 20, 2011Quiz Created by
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