lecture 11

What is helioseismology?

• The study of vibrations inside the stars

• The study of vibrations inside the Earth

• The study of vibrations inside the Sun

• The study of vibrations inside the Moon

What gave rise to the Solar Neutrino problem?

• Detection of three times fewer neutrinos than expected

• Detection of no neutrinos

• Detection of three times more neutrinos than expected

• Detection of an increase in neutrino activity

What are sunspots?

• Bright regions found on the Sun's surface

• Dark regions found on the Sun's surface

• Regions of intense heat on the Sun's surface

• Regions of intense magnetic activity on the Sun's surface

What causes mass to fly off during coronal mass ejections?

• Explosions on the Sun's surface

• Explosions in the Sun's magnetic fields

• Explosions in the Sun's atmosphere

• Explosions in the Sun's core

What do we see when the solar wind interacts with Earth's magnetic fields?

• Aurorae

• Rainbows

• Tornadoes

• Earthquakes

How often do the Sun's spots and magnetic fields vary?

• Every 20 years

• Every 5 years

• Every year

• Every 11 years

What did the Maunder minimum coincide with?

• The Age of Enlightenment

• The Little Ice Age

• The Industrial Revolution

• The Renaissance

Which star appears brighter, Alpha Centauri or the Sun?

• It depends on the time of day

• The Sun

• Alpha Centauri

• They have the same brightness

If Alpha Centauri were three times farther away, how would its apparent brightness change?

• It would be only 1/6 as bright

• It would be three times brighter

• It would be only 1/9 as bright

• It would be only 1/3 as bright

How do we measure distances to nearby stars?

• Using parallax

• Using telescopes

• Using satellites

• Using radar