M1L2: Star Life Cycles and Natural Elements
Our sun is a(n) _____________ star.
main sequence
Which of the stars is the oldest?
White Dwarf
A red giant becomes this after it runs out of fuel.
Planetary nebula
The mass of a star has a correlation to the type of elements that can be created by the star.
T
Most stars are 98% made up of which of the following elements? (Choose all that apply)
hydrogen helium
A remnant of a supernova is a(n)______ star.
Neutron
Different chemical elements will create a different scattering of absorption lines in the spectrum of visible light. We understand the interaction of an atom with light, and because of this we can predict where the lines should be and verify this in a lab. This process is called?
Spectroscopy
Big Bang
the rapid expansion of matter from a state of extremely high density and temperature that according to current cosmological theories marked the origin of the universe
A star is a nuclear fusion furnace that creates elements.
true
A high-mass star can end its life cycle as a(n) ________.
supernova
A star in an embryo stage.
protostar
Which of the stars has the highest surface temperature?
white dwarf
The more massive elements than hydrogen and helium, all the way up to the heaviest elements on the periodic can be produced without a supernova explosion.
F
Which of the stars is burning hydrogen in the core?
Main Sequence
Occurs when a white dwarf adds materials from a nearby red giant.
Nova
Which of the stars is burning helium in the core?
Red Giant
A star that burns helium and forms carbon by nuclear reactions.
Red giant
Supernova
a star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass
Hertzsprung-Russell (H-R) Diagram
a two-dimensional graph, devised independently by Ejnar Hertzsprung (1873-1967) and Henry Norris Russell (1877-1957), in which the absolute magnitudes of stars are plotted against their spectral types. Stars are found to occupy only certain regions of such a diagram
Nucleosynthesis
the cosmic formation of atoms more complex than the hydrogen atom