H-R Diagram

Absolute magnitude is defined as...

• the brightness of an object in space, measured as if you’re 10 parsecs away from the object.
• Total energy emitted by a space object per unit time.
• the brightness of an object in space, as it appears from Earth
• the color of an object in space, described on a number scale.

The effective temperature of a star is related to its...

• solar system
• luminosity
• absolute magnitude
• color

The color index of a star provides information about that star’s

• age
• luminosity
• absolute magnitude
• temperature

These are H-R Diagrams of different star clusters.  Which one of these clusters is oldest and how do you know?

• The right; It has the highest proportion of stars that have become red giants.
• The middle; it has the highest proportion of stars in the main sequence.
• The right; It has the highest proportion of brown dwarf stars.
• The left; it has the highest number of blue giants.

Tags

NGSS.HS-ESS1-3

In which region of the H-R Diagram would you be likely to find Blue Giants?

• W
• X
• Y
• Z

Tags

NGSS.HS-ESS1-3

In which region of the H-R Diagram would you be likely to find the oldest stars?

• W
• X
• Y
• Z

Tags

NGSS.HS-ESS1-3

In which region of the H-R Diagram would you be likely to find stars fusing hydrogen to make helium in their cores?

• W
• X
• Y
• The orange dashed line

Tags

NGSS.HS-ESS1-3

NGSS.HS-ESS1-1

In which region of the H-R Diagram would you be likely to find stars that are in hydrostatic equilibrium?

• W
• X
• Y
• The orange dashed line

In which region of the H-R Diagram would you be likely to find the brightest, reddest stars?

• W
• X
• Y
• The orange dashed line

What is the primary difference between a star of spectral class K0 in the Y region, compared to a star of spectral class K0 in the X region?

• temperature
• color
• brightness
• color index