Universe EXAM 6.1

Which has longer wavelengths?

• Radio

• Visible

• Gamma

• X-ray

Stars form in giant clouds of gas and dust. What are these clouds called?

• Black Hole

• White Dwarf

• Super Nova

• Nebula

Which component of the universe contains all other components listed below and would have the greatest mass?

• Solar system

• Nebula

• Galaxy

• Planetary System

When a mass of hydrogen has enough density, it begins to fuse the hydrogen atoms together. This produces heat and light. What is this classified as?

• nebula

• star

• galaxy

• planet

Where did the Sun form?

• From a nebula outside of the Milky Way Galaxy

• From a large cloud of gas and dust in a nebula called the Milky Way Galaxy

• Near the outer edge of the Milky Way Galaxy. After its formation, it interacted with other planets to form comets

• The Sun was formed in a nebula in the Milky Way Galaxy.

Which describes the location of star A correctly?

• Star A is less bright than the Sun and has a surface temperature above 25,000 K

• Star A is brighter than the Sun and has a surface temperature below 25,000 K

• Star A is less bright than the Sun and has a surface temperature of above 11,000 K

• Star A is brighter than the Sun and has a surface temperature below 11,000 K.

Which type of stars belong to spectral class K and have the lowest luminosity?

• Giants

• White Dwarfs

• Supergiants

• Main-Sequence stars

Which of these correctly identifies different objects in the universe according to their size and composition?

• A nebula is larger than a galaxy

• a solar system contains many stars

• a galaxy contains many solar systems

• a galaxy is bigger than a universe

Where in the Milky Way is Earth found?

• Our Sun is in the middle of the galaxy

• about 1 light year from the middle of the galaxy

• It varies depending on how it rotates

• Near the outer edge of the galaxy

What is the nearest star to planet Earth

• Moon

• Sun

• Sirius

• Proxima Centauri