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SCI102 Threshold 3 Flashcards | StudBud
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SCI102 Threshold 3
SCI102 Threshold 3
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Big History Review
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Questions
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Answers
1
When did stars begin to form?
100-200 million years after the Big Bang
we don't know
10 million years ago
seconds after the Big Bang
2
What are the ingredients, Goldilocks Conditions, and new complexity for Threshold 2?
Gravity+heat+density of matter= new chemical elements
Gravity + Helium + Hydrogen= Stars Light Up
We don't know + we don't know= Stars light up
H, He, gravity+heat & tiny density variations=stars light up
3
What is the fundamental force of attraction between any two objects that have mass?
Strong Nuclear Force
Gravity
Electromagnetism
Weak Nuclear Force
4
What type of reaction is happening in the core of stars?
nuclear fusion
nuclear fission
nuclear expansion
gravity
5
Which one of the four fundamental forces compresses clouds of elements to create stars?
weak nuclear forces
gravity
strong nuclear forces
electromagnetism
6
What are the ingredients and goldilocks conditions for Threshold 3?
gravity+hydrogen+helium+heat= new chemical elements
we don't know+we don't know= new chemical elements/chemistry
aging/dying stars+no fuel/stars collapsing = chemistry
we don't know+dying stars+heat= new chemical elements
7
Stars spend most of their lives in which stage?
Planetary Nebula
Red Giant
Main Sequence
Stellar Nebula
8
How is the periodic table organized?
elements are grouped by type and density
Elements are listed alphabetically
elements are arranged by the atomic mass
by atomic number and grouped by common characteristics
9
What was the Universe like before stars formed?
10 million degrees Celsius and rising
bright and hot with pockets of activity
we don't know
cold, dark, boring, and relatively empty
10
How are elements with more protons than iron formed?
when iron is burned as fuel for a dying star
in a supernovae
there is no elements with more protons than iron
when iron is melted in the core of a star
11
H and He make up what percentage of the Universe?
50% and all other elements make up the other 50%
60% and all the others make up 20%
75% and all others make up 25%
98% with all others making up 2%
12
What is Threshold 3?
the Big Bang
New Chemical Reactions
Stars light up
New Chemical Elements
13
What is the evidence for variations in density of matter and the temperature needed for stars?
the Periodic Table
Electromagnetism
Cosmic Background Radiation
The Big Bang
14
What temperature is necessary for protons to overcome the repulsion of their charges and fuse?
1 million degrees Celsius
5 million degrees Kelvin
10 million degrees Celsius
5 billion degrees Fahrenheit
15
What type of stars have a longer life span?
The all have the same life span
High Mass
Low Mass
Medium Density
16
What is a small unit of matter composed of protons, electrons, and neutrons?
Particle
Atom
Quark
Diatom
17
How long is our Sun's lifespan?
10 million years
380,000 years
9=10 billion years
1 billion years
18
All of the following are true EXCEPT: Without stars we would not have...
light
the heavy elements needed for life
heat
the Big Bang
19
What does a high mass star become when it "dies"?
Black hole or neutron star
planetary nebula
Red Giant
Stellar nebula
20
What is the low energy radiation that is spread through the Universe after the Big Bang?
Microwaves
Radio Waves
Electromagnetic Waves
Cosmic Background Radiation
21
All stars begin and end as what?
nebula
all elements
hydrogen
water
22
What is the study of composition, structure, properties, and change of matter?
Calculus
Biology
Chemistry
Physics
23
How long do low mass stars "live"?
around 380,000 years
no one knows
billions to trillions of years
thousands of years
24
How long does the Sun have left to "live"?
10 billion years
4.5 billion years
no one knows
10 million years
25
Which stars eventually run out of fuel?
Just red giants
All stars
Low mass stars only
High mass stars only
