M1L2: Star Life Cycles and Natural Elements

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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


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