Stars and Solar System

What characteristics are used to classify stars? (Select all that apply)

• Size

• Brightness

• Temperature

• Distance from sun

Rank the colors of stars from hottest to coolest.

• Blue, white, yellow, orange/red, red

• Blue, yellow, white, orange/red, red

• Red, orange/red, white, yellow, blue

• Red, orange/red, yellow, white, blue

What is absolute brightness?

• Brightness the star would have if it were at a standard distance from Earth

• How bright the star looks from Earth

What is apparent brightness?

• Brightness the star would have if it were at a standard distance from Earth

• How bright the star looks from Earth

luminous globe of gas which produces its own heat and light by nuclear reaction

• Star

• Spectroscope

• Spectra

What is a supernova?

• The start of a star's life

• A collapsing galaxy

• The explosion of a dying supergiant star

• A small, dim star

Peter has learned that many stars are actually larger than the sun. If this is true, why do these stars appear like points of light in the sky?

• These stars are hotter than the sun.

• These stars have less mass than the sun.

• These stars are farther away from Earth than the sun is.

• These stars are made of different chemicals than the sun.

Sirius appears to be the brightest star in the nighttime sky, even though a star named Arcturus gives off more light. Why do you suppose Sirius appears to be brighter than Arcturus in our nighttime sky?

• Sirius is larger than Arcturus is.

• Sirius omits different gases than Arcturus does.

• Sirius is closer to Earth than Arcturus is.

• Sirius is a different color than Arcturus.

Which of the following best explains why Sirius appears brighter than Pollux in our nighttime sky?

• Sirius has a different color than Pollux

• Sirius has different gases than Pollux

• Sirius is closer to Earth than Pollux

• Sirius is farther that Pollux

What is the scientific name for the STAR we call "North Star"?

• Little dipper

• Hercules

• Polaris

• Ursa minor