Types of Galaxies

A significant difference between spiral and elliptical galaxies is the —

• ongoing star formation, common in spiral galaxies but not in elliptical galaxies

• high star density at the core of spiral galaxies but not elliptical galaxies

• presence of irregular galaxies within elliptical galaxies but not spiral galaxies

• relatively large percentage of new stars in elliptical galaxies but not in spiral galaxies

Which of the following statement is true about black holes?

• they are extremely dense quantities of matter in space

• they have strong gravitational pulls that nothing can travel through

• made when a star that is 30 times heavier than the Sun dies

• all of the above

What are characteristics of spiral galaxies?

• core is made out of old stars

• arms contain younger stars

• have a flattened disk with a central bulge and spiral arms

• all of the above

Which of the following statement is FALSE about dwarf galaxies?

• has low luminosity

• found in clusters and most abundant

• high mass

• small size

What are the different types of dwarf galaxies?

• elliptical, spiral, irregular

• elliptical, lenticular, spiral

• spiral, lenticular, square

• elliptical, spiral, wave

What instrument was used to explore the extreme deep field in space?

• Spitzer Space telescope

• Hubble telescope

• Compton Gamma Ray Observatory Spacecraft

• COBE

What is a huge collection of of gas, dust, billions of stars, planets and other celestial objects?

• A star

• A planet

• A galaxy

• A comet

Which of the following statement is TRUE about elliptical galaxies?

• they are spherical or oval shaped

• they are older with very little gas, dust, or young stars

• half of the galaxies that we see are elliptical

• all of the above

The Milky Way galaxy is a type of _________________ galaxy.

• irregular

• lenticular

• spiral

• elliptical

What force holds the celestial objects, gas particles, and dust particles in place?

• weak nuclear force

• gravitational force

• electromagnetic force

• strong nuclear force

Tags

NGSS.HS-PS2-4