The Universe

Front

What factors does the H-R diagram classify stars by?

Back

Temperature and luminosity.

Front

What is the difference between a meteoroid, meteor, and meteorite?

Back

Meteoroids are pieces of an asteroid, meteors are streaks of light in the sky, and a meteorite is a meteor that has landed on Earth.

Front

Which star has a longer life, a main sequence star or a blue giant?

Back

A main sequence star.

Front

True or False: Both the distance between objects and the mass of the objects affect the gravitational pull.

Back

True.

Front

As a whole, are Giants considered hotter than White Dwarfs?

Back

False.

Front

What is a star?

Back

A star is a massive, luminous sphere of plasma held together by gravity, undergoing nuclear fusion.

Front

What is the main sequence in the context of stars?

Back

The main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness.

Front

What is a blue giant?

Back

A blue giant is a very hot, massive star that has a high luminosity and is in the later stages of stellar evolution.

Front

What is gravitational pull?

Back

Gravitational pull is the force of attraction between two objects with mass, which depends on their masses and the distance between them.

Front

What is a comet?

Back

A comet is an icy small body that, when passing close to the Sun, heats up and begins to release gases, forming a glowing coma and sometimes a tail.