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Astrophysics for People in a Hurry: Part 1 Flashcards | StudBud
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Astrophysics for People in a Hurry: Part 1
Astrophysics for People in a Hurry: Part 1
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1
What does gravity hold together?
Stars and planets
Atoms and molecules
Quarks and leptons
Electrons and protons
2
What is the name of the German physicist after whom Planck units are named?
Albert Einstein
Werner Heisenberg
Erwin Schrödinger
Max Planck
3
How many basic forces are theorized to control everything in the universe today?
2
8
4
6
4
Is a solid theory for quantum gravity agreed upon?
No
Yes
5
When did Max Planck introduce the idea of quantized energy?
1930
1900
1910
1920
6
When was the Planck era?
T=0 to T=10^-22 seconds
T=0 to T=10^-43 seconds
T=0 to T=10^-29 seconds
T=0 to T=10^-36 seconds
7
Are there known laws of physics that describe the Planck era?
No
Yes
8
How small was the universe at the beginning?
less than one-billionth of a period
less than one-thousandth of a period
less than one-millionth of a period
less than one-trillionth of a period
9
When was quantum mechanics discovered?
1960
1900
1920
1940
10
Which force separated first from the others?
Weak nuclear force
Strong nuclear force
Electromagnetic force
Gravity
11
What does gravity prevent 10-year-olds from doing?
Swimming
Riding bicycles
Playing soccer
Dunking basketballs
12
What is Max Planck known as the father of?
Gravity
Quantum mechanics
Electromagnetism
Relativity
13
What does quantum theory try to explain?
Explaining the behavior of celestial bodies
Explaining the origin of the universe
Explaining the behavior of matter and energy on a small scale
Explaining the nature of time travel
14
How old is the universe estimated to be?
18 billion years
22 billion years
14 billion years
10 billion years
15
What happened to the force of gravity by the end of the Planck era?
It wriggled free of the others
It disappeared
It merged with the others
It remained unchanged
16
Gravity keeps the Earth_______?
Expanding
Orbiting the Sun
Spinning
Colliding
17
What do physicists believe happened at the beginning of the universe?
The Universal Eruption
The Great Expansion
The Cosmic Inflation
The Big Bang
18
What caused the universe to expand and cool?
Being impacted by an external force
Being extremely hot and dense
Being held together by gravity
Being completely empty and cold
19
How old was Neil DeGrasse Tyson when he decided to become an astrophysicist?
18
9
12
15
20
What is the main goal of quantum gravity?
Discovering new particles
Unifying quantum mechanics and general relativity
Describing the behavior of black holes
Explaining dark matter
21
When did Albert Einstein propose the theory of relativity?
1926
1906
1916
1936
22
What does the theory of relativity describe?
Matter and energy curving the fabric of space and time surrounding it
The expansion of the universe
The behavior of subatomic particles
The motion of celestial bodies
23
The dot contained every particle in the universe today including your bodies particles.
FALSE
TRUE
24
Were all basic forces unified in the instant after the Big Bang?
No
Yes
25
What are physicists trying to combine?
Quantum mechanics and electromagnetism
Relativity and gravity
Quantum mechanics and gravity
Relativity and quantum mechanics
26
What was the approximate temperature of the universe during the Planck era?
Moderate temperature
Extremely hot
Constantly fluctuating
Extremely cold
