6th Review Topic 12

Front

What is a nebula?

Back

A nebula is a large cloud of gas and dust in space, often the region where stars are born.

Front

What determines a star's life cycle?

Back

A star's life cycle is determined by its mass.

Front

Which planet is the farthest from the sun?

Back

Neptune is the farthest planet from the sun.

Front

What is a dwarf planet?

Back

A dwarf planet is a celestial body that has enough gravity to be round but has not cleared out the region of the solar system along its orbit.

Front

Which planet tilts 90 degrees on its axis?

Back

Uranus tilts 90 degrees on its axis.

Front

What is the process of nuclear fusion?

Back

Nuclear fusion is the process by which two light atomic nuclei combine to form a heavier nucleus, releasing energy.

Front

What is a protostar?

Back

A protostar is a stage in the formation of a star, where a cloud of gas and dust begins to collapse under its own gravity.

Front

What is the main component of a star?

Back

The main component of a star is hydrogen, which undergoes nuclear fusion to produce helium and energy.

Front

What is the solar system?

Back

The solar system is a collection of celestial bodies, including the sun, planets, moons, asteroids, and comets, that are bound by gravity.

Front

What is the difference between a planet and a dwarf planet?

Back

A planet has cleared its orbit of other debris, while a dwarf planet has not.