Ch 8.1 Stars and Galaxies

Are blue stars hotter than red stars? Refer to page 400 for information.

• Sometimes
• Yes
• No
• Maybe

Stars give off light as part of a nuclear fission reaction in which helium atoms are split into hydrogen atoms?

• True

• False

Does a star explode as a supernova before it becomes a black hole?

• No
• Sometimes
• Rarely
• Yes

Do some stars orbit a neighboring star as part of a binary star system?

• Yes
• No
• Maybe
• Rarely

The brightness of a star measured by an observer who is a standard 32.6 light years aways is called

• Apparent magnitude
• Angular diameter
• Luminosity
• Absolute magnitude

Does the force of gravity maintain the star's size, when a star's mass is stabilized?

• Yes
• No
• Sometimes
• Rarely

Tags

NGSS.HS-PS2-4

Most galaxies are isolated out in space.

• True
• False
• Partially true
• Depends on the galaxy

How were stars classified in the 1880s?

• Based on spectral characteristics
• Based on spectra

• Based on distance from Earth
• Based on size

What type of stars have a balance between pressure and gravity?

• Main sequence stars
• White dwarfs
• Black holes
• Red giants

What is the most common galaxy?

• Spiral galaxy
• Irregular galaxy
• Barred spiral galaxy
• Elliptical galaxy