Star Life Cycles
HR Diagrams
Radiometric Dating
Unit 1
Sun's Layers
100
What element is a main sequence star fusing?
hydrogen
100
What stars are A, B, C, and D?
A = low mass main sequence
B = high mass main sequence
C = white dwarf
D = red super giant
100
With radioactive decay, the amount of parent isotope ________ and the amount of daughter isotope _________.
decreases, increases
100
Which theory states that the universe has expanded?
A. Big Bang
B. Steady State
C. Both
C. Both
100
Which inner layer of the Sun has the highest temperature and pressure?
core
200
The next stage of life for the Sun after it runs out of hydrogen.
Red giant
200
Which type of star is this?
Temp: 20,000K Lum: 10^-3
White dwarf
200
25% of the parent isotope Carbon 14 remains in a sample. How old is the sample?
11,460 years
200
Edwin Hubble noticed distant galaxies are __________. This evidence supports which theory?
redshifting (moving away), Big Bang
200
Which inner layer of the Sun does energy take the longest amount of time to travel through?
radiative zone
300
What happens to a super giant after fusion stops?
Supernova
300
Which type of star is this?
Temp: 3,000K Lum: 10^6
Supergiant
300
How many years is one half life of carbon 14?
5,730
300
What is the name of the leftover energy from the Big Bang?
CMB (Cosmic Microwave Background Radiation)
300
In which layer of the Sun does fusion occur?
core
400
The "end of life" for a low/average mass star
White dwarf
400
Will this star supernova?
Temp: 40,000K Lum: 10^4
Yes! It is a high mass main sequence star
400
How many half lives has a parent isotope gone through if 12.5% of it remains?
3
400
Which theory states that new matter has been created to fill in the "empty space" as the universe has expanding?
A. Big Bang
B. Steady State
C. Both
B. Steady State
400
What element is currently being produced in the core of the Sun?
helium (being formed by fusion from two hydrogen atoms)
500
What are the "end of life" options for a high mass star?
Neutron Star, Black hole
500
What element is this star fusing?
Temp: 5,000K Lum: 10^2
Helium
500
Which isotope below has the longest half life?
Copper 64 (red)
500
The abundance of these two elements in the universe supports the Big Bang Theory.
Hydrogen and helium
500
Draw and label the 3 inner layers of the Sun.
