Our View From Earth Test

What color of star is the hottest?

• Blue
• Red
• Yellow
• Orange

Why do other stars appear so much smaller than the sun?

• They are actually much smaller
• They are so far away
• They are not as bright
• They are dwarf stars

Which statement best describes stars?

• large planets that are composed mostly of gases

• celestial bodies made up of gas that give off light

• faint dots of light that can be seen from Earth's surface

• objects that form in the outer parts of the solar system

Two stars have the same apparent magnitude as seen from Earth’s surface. Star A is 33 ly away. Star B is 346 ly away. Which of the following claims is supported by the evidence?

• Star B is larger than Star A

• Star B is more luminous than Star A

• The stars have the same absolute magnitude

• Star A has a smaller absolute magnitude

the brightness of a star as seen or appears from Earth

• apparent magnitude

• luminosity

• absolute magnitude

• light year

How bright a star would be if at a standard distance

• apparent magnitude

• absolute magnitude

• light year

• binary star

the true brightness of an object

• luminosity

• apparent magnitude

• solar radii

• parallax

When talking about apparent magnitude, what kind of stars have positive (larger) numbers?

• Faint stars

• Bright stars

A negative number on the apparent magnitude scale refers to a ...?

• dimmer star

• brighter star

Which two terms refer to how bright a star ACTUALLY is?

• absolute magnitude and luminosity

• apparent magnitude and luminosity

• size and luminosity

• apparent magnitude and absolute magnitude