8.8A CFA

Posljednje ažuriranje almost 6 years ago

Biblioteka

8.8A CFA

Posljednje ažuriranje almost 6 years ago

Pitanje 1

Whis statement best describes a nebula?

A mass of dust and ice that orbits a star in an elliptical pattern.

A ball of plasma that experiencs nuclear fusion in its core.

A system of billions of stars, gas, and dust held together by gravity.

A cloud f gas that is the birthplace of stars.

Pitanje 2

The universe has many different components. Which list places four components of the universe in the most likely order from least mass to most mass?

Nebula, planet, star, galaxy

Planet, star, galaxy, universe

Galaxy, star, planet, moon

Universe, star, nebula, moon

Pitanje 3

Which of these obervations of Sirius B is most likely accurate?

Sirius B is hotter and brighter than the sun.

Sirius B is cooler and less bright than the sun

Sirius B is hotter and and less bright than the sun

Sirius B has the same temperature and luminousity of the sun

Pitanje 4

Based on this diagram, which type of stars would belong to spectral class K and have the lowest luminosity?

Supergiants

Giants

White Dwarfs

Main Sequence

Pitanje 5

Which area of the diagram represents the stars classified as giants?