The Universe - 8th Grade (Mastery Peak)

Front

What is a Hertzsprung-Russell diagram?

Back

A graphical representation of stars that shows the relationship between their absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.

Front

What is a comet?

Back

A celestial object made of ice and dust that, when close to the Sun, displays a visible atmosphere or coma and sometimes a tail.

Front

Where are stars formed?

Back

Stars are formed in nebulae, which are large clouds of gas and dust in space.

Front

What is an irregular galaxy?

Back

A type of galaxy that does not have a distinct regular shape, often containing a mix of stars, gas, and dust.

Front

What defines an average main sequence star?

Back

An average main sequence star, like the Sun, is a star that is in the stable phase of its life cycle, fusing hydrogen into helium in its core.

Front

What is a nebula?

Back

A nebula is a giant cloud of dust and gas in space, often the birthplace of stars.

Front

What is a black hole?

Back

A region of space where the gravitational pull is so strong that nothing, not even light, can escape from it.

Front

What is a supernova?

Back

A supernova is a powerful and luminous explosion that occurs at the end of a star's life cycle.

Front

What is a spiral galaxy?

Back

A type of galaxy characterized by its spiral arms that wind outward from the center, containing stars, gas, and dust.

Front

What is the difference between a star and a planet?

Back

A star is a massive, luminous sphere of plasma held together by gravity, while a planet is a celestial body that orbits a star and does not produce its own light.