Components of the Universe

Characteristics used to classify stars include:

• distance, size, and color.

• size, distance, and brightness.

• color, brightness, and distance.

• size, brightness, and temperature.

The Hertzsprung-Russell diagram shows that main-sequence stars:

• are mostly hot and dim.

• are mostly cool and bright.

• increase in brightness as they increase in temperature.

• decrease in brightness as they increase in temperature.

A star is born when:

• a nebula expands

• helium and oxygen combine

• nuclear fusion starts

• a protostar begins to cool

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

A supernova is the explosion of a dying:

• medium-mass star

• high-mass star

• protostar

• low-mass star

Tags

NGSS.HS-ESS1-3

What color are the coolest stars?

• blue-white

• yellow

• red

• orange

The absolute brightness of a star depends on its:

• distance and temperature

• size and temperature

• color and temperature

• distance and color

The Milky Way galaxy is an example of a(n)

• spiral galaxy

• globular cluster

• elliptical galaxy

• irregular galaxy

Tags

NGSS.MS-ESS1-2

What is defined as the distance between wave crests?

• Speed

• Wavelength

• Amplitude

• Frequency

Tags

NGSS.HS-PS4-1

Which of the following shows all wavelengths of the electromagnetic spectrum that are used to gain

information about the components of the universe?

• Radio, infrared, and visible light

• Radio, infrared, Ultraviolet, and X-rays

• Radio, infrared, visible light, ultraviolet, and X-rays

• Radio, infrared, visible light, ultraviolet, X-rays, and gamma rays

Tags

NGSS.HS-ESS1-2

NGSS.HS-PS4-3

What is a light-year?

• The distance between two stars

• The distance light travels in one year

• The time it takes light to travel 300,000,000 meters

• The time it takes light to travel to Earth from the Sun