Galaxy Classification and Hubble's Law

The universe is ________________.

• expanding
• staying constant
• shrinking
• exploding

What is the formula for Hubble's Law?

• V=H x d
• H= V x d
• d= H x V
• H= d/V

What is on the y-axis in the Hubble's Law graph?

• Recessional velocity
• Distance
• Hubble's constant
• Proportionality constant

What is on the x-axis in the Hubble's Law graph?

• Recessional velocity
• Distance
• Hubble's constant
• Proportionality constant

Where do you find H in the Hubble's Law graph?

• y-intercept
• x-intercept
• slope
• at the galaxy

What are the standard units for Hubble's constant?

• km/s
• seconds (or years)
• Mpc/km/s
• km/s/Mpc

What is recessional velocity

• Red-shift
• Hubble time
• The relative distance to the galaxy
• Speed that galaxies are moving away

How is the Hubble constant used to find the age of the universe?

• age = v ÷ d x H
• age = 1/H
• age = H
• age = H x d

T or F: There are many different methods to measure distance and this causes error in calculating the Hubble constant

• True
• False

What is the current accepted age of the universe according to many Big Bang cosmologists?

• 2 billion years
• 20.1 billion years
• 13.8 billion years
• 75 billion years