Universe Practice E

Front

What is the hottest star color?

Back

Blue stars are the hottest stars in the universe.

Front

What is a galaxy?

Back

A galaxy is a group of millions of stars, dust, and gas held together by gravity.

Front

Why do planets revolve around stars?

Back

Planets revolve around stars due to the force of gravity.

Front

What is a nebula?

Back

A nebula is a cloud of gas and dust in space.

Front

Why do stars group together to form galaxies?

Back

Stars group together to form galaxies because of the force of gravity.

Front

What is the main force that holds galaxies together?

Back

Gravity is the main force that holds galaxies together.

Front

What is the difference between a star and a planet?

Back

A star is a massive celestial body that produces light and heat through nuclear fusion, while a planet is a smaller body that orbits a star.

Front

What is the life cycle of a star?

Back

The life cycle of a star includes stages such as nebula, main sequence, red giant, and supernova.

Front

What is the Milky Way?

Back

The Milky Way is the galaxy that contains our solar system.

Front

What is a black hole?

Back

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