ESRT: Stars

Which star has a surface temperature most similar to the surface temperature of Alpha Centauri?

• Polaris

• Betelgeuse

• Procyon B

• Sirius

Which star is hotter, but less luminous, than Polaris?

• Deneb

• Aldebaran

• Sirius

• Pollux

Which two stars are most similar in luminosity?

• Betelgeuse and Barnard's Star

• Procyon B and Proxima Centauri

• Polaris and the Sun

• Alpha Centauri and Sirius

Compared the the Sun, the star Betelgeuse is

• less luminous and warmer

• less luminous and cooler

• more luminous and warmer

• more luminous and cooler

Which of the following are characteristic of the surface temperature and luminosity of some white dwarf stars?

• Surface Temperature: 5,000 K Luminosity: 100

• Surface Temperature: 5,000 K Luminosity: 0.001

• Surface Temperature: 10,000 K Luminosity: 100

• Surface Temperature: 10,000 K Luminosity: 0.001

Which star is more massive than our Sun but has a lower surface temperature?

• 40 Eridani B

• Sirius

• Aldebaran

• Barnard's Star

For other stars in our galaxy that go through a similar life cycle to our Sun, which star is currently in the late stage of its life cycle?

• Alpha Centauri

• Procyon B

• Bernard's Star

• Polaris

The approximate age of the universe is estimated to be

• 4.6 million years

• 4.6 billion years

• 13.8 million years

• 13.8 billion years

The theory that the universe is expanding is supported by data from the

• nuclear decay of radioactive materials

• nuclear fusion of radioactive materials

• blue shift of light from distant galaxies

• red shift of light from distant galaxies

Which evidence best supports the theory that the universe was created by an explosion called the Big Bang?

• impact craters found on Earth

• cosmic background radiation

• the different compositions of terrestrial and jovian planets

• the blue shift of light from distant galaxies