Galaxies and Star Systems

Which phrase best defines a star system?

• a group of hundreds of stars

• a group of two or more stars

• a group of stars that formed around the same time

• a group of stars in which one star is brighter than the other

Which statement accurately describes binary star systems?

• They have more than two stars.

• They have stars that are always visible.

• They include large groups of stars.

• They have stars that might appear to wobble.

The dimmer star in a two-star system passes in front of the brighter star. Which phenomenon does this describe?

• nebular cluster

• globular cluster

• wobbling cluster

• eclipsing binary

Which term refers to large groupings of stars?

• nebulas

• galaxies

• binary stars

• star clusters

Which sentence accurately describes star clusters?

• stars appear brighter

• stars from large groupings

• stars form at different times

• stars form from different nebula

Which type of star cluster is loose and disorganized?

• binary

• eclipse

• globular

• open

Which type of star clusters forms from tightly packed groups of older stars?

• binary

• eclipse

• globular

• open

Look at this image of a star cluster. Which type of star cluster is shown?

• open

• binary

• globular

• eclipsing

Tags

NGSS.MS-ESS1-2

Which phrase best defines a galaxy?

• tightly packed group of older stars

• large grouping of more than two stars

• loose, disorganized star cluster held together by gravity

• large collection of stars, gas, and dust held together by gravity

Which feature is used to classify galaxies?

• age

• color

• shape

• size