Ch. 6 Stars, Galaxies & the Universe Review

The surface temperature of main-sequence stars increases as _____.

• absolute brightness increases

• diameter decreases

• diameter increases

• absolute brightness decreases.

The Hertzsprung-Russell diagram classifies stars based on their ___ and their ___.

• distance from Earth

• diameter

• absolute brightness

• color

• surface temperature

A light-year is a unit used to express ___.

The spectrum of visible light from a star has a pattern of dark lines.

What characteristic about the star can a scientist determine by analyzing this pattern?

Tags

NGSS.HS-ESS1-3

Which of the following is part of the electromagnetic spectrum?

• mircowaves

• visible light

• ultraviolet

• soundwaves

• infrared

Tags

NGSS.HS-PS4-3

What is defined as the distance between wave crests?

• speed

• wavelength

• amplitude

• frequency

Tags

NGSS.HS-PS4-1

According to Hubble's law, how do two galaxies at different distances from Earth compare?

• The farther away the galaxy is, the faster it is moving away from us.

• The closer the galaxy is to Earth, the bluer its stars are.

• The closer the galaxy is, the hotter its stars are.

• The farther away the galaxy is, the more dark matter it contains.

How would you classify the Aldebaran star?

• blue

• white dwarf

• giant

• red-orange

Tags

NGSS.HS-ESS1-3

How would you classify the Sirius B star?

• blue

• white dwarf

• giant

• red-orange

How would you classify the Algol star?

• medium

• 15,000 ℃

• 8,000 ℃

• high

Tags

NGSS.HS-ESS1-3