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WorksheetsStar Formation and Galaxies
Total questions: 15
Worksheet time: 11mins
Which of the following are galaxy types?
Spiral
Elliptical
Spherical
Irregular
Stars are born in clouds of stellar dust called _______________.
nebulas
galaxies
planets
supernovas
What is the most abundant element found in nebulas?
Helium
Carbon
Oxygen
Hydrogen
What temperature does fusion begin?
10 thousand degrees celsius
10 million degrees celsius
10 billion degrees celsius
1 billion kelvin
During the fusion process of a main sequence star, ______________ is turned into _____________.
hydrogen; helium
helium; hydrogen
hydrogen; iron
carbon; oxygen
What factor determines the life cycle of a star?
color
mass
temperature
location in the galaxy
What is the first stage of every star?
protostar
main sequence
blue giant
white dwarf
What is the last stage of our star (the sun)?
red giant
white dwarf
supernova
black hole
How big will our star (the sun) become when it enters the 'red giant' phase?
its radius will become one third its current size
its will radius will envelop the entire solar system
its radius will be the same size as Earth
it will expand to a radius that goes past Earth
If a galaxy appears to be more red-shifted, that means that ...
it contains more red stars
it is moving away from Earth
it is moving towards Earth
it has just the right amount of gravity
