Galaxies and the Universe TEST

_____________ are huge collections of stars.

• universe
• solar systems
• galaxies
• nebula

Tags

NGSS.MS-ESS1-2

Scientists hypothesize that more than _________ of the universe's mass is dark matter.

• 75%
• 99%
• 70%
• 90%

Galaxies can be spiral, elliptical, or regular.

• True
• False

Spiral Galaxies have the following characteristics. (mark 5)

• spiral arms
• central disk
• central bulge
• spherical halo of globular clusters
• older, redder stars surrounds the disk

Elliptical Galaxies have the following characteristics. (mark 4)

• spheres, like basketballs.
• have higher percentages of old, red stars
• shaped like footballs
• form as the gravity of two or more spiral galaxies come together
• spiral arms

Irregular Galaxies have the following characteristics. (mark 4)

• oddly shaped
• form from the gravitational pull of neighboring galaxies
• contain many young stars
• have areas of intense star formation.
• spheres, like basketballs.

Tags

NGSS.MS-ESS1-2

Which galaxy is this?

• irregular
• elliptical
• spiral

Which galaxy is this?

• irregular
• elliptical
• spiral

Tags

NGSS.MS-ESS1-2

Which galaxy is this?

• irregular
• elliptical
• spiral

Tags

NGSS.MS-ESS1-2

Galaxies are distributed evenly in the universe.

• True
• False