Stars and Galaxies

The sun produces energy by

• attracting it with the force of gravity.

• nuclear fission.

• burning fuels such as oil.

• nuclear fusion.

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8

Which part of the sun can be seen only during a total solar eclipse?

• Sunspots

• The corona

• The photosphere

• Solar prominences

Tags

NGSS.MS-ESS1-1

Why do sunspots look darker than the rest of the sun's photosphere?

• Sunspots are lighter than the surrounding areas.

• Sunspots are hotter than the surrounding areas.

• Sunspots are cooler than the surrounding areas.

• Sunspots are less dense than the surrounding areas.

All of the following are parts of the range of the electromagnetic spectrum except

• infrared radiation.

• sound waves.

• ultraviolet radiation.

• X-rays.

Reflecting telescopes differ from refracting telescopes in having

• a mirror instead of an objective lens.

• two large objective lenses.

• no eyepiece lens.

• one large objective lens.

Parallax is used to determine a star’s

• distance from Earth.

• temperature.

• composition.

• brightness.

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

Characteristics used to classify stars include

• distance, size, and color.

• size, distance, and brightness.

• color, brightness, and distance.

• size, brightness, and temperature.

The absolute brightness of a star depends on its

• distance and temperature.

• size and temperature.

• color and temperature.

• distance and color.

A scientist is planning an investigation to determine the chemical composition of a distant star. Which strategy should she use?

• Use an optical telescope to observe the color of the star.

• Use an X-ray telescope to observe the X-rays emitted by the star.

• Use a spectrograph to observe the spectrum of visible light from the star.

• All the above

Tags

NGSS.HS-ESS1-2

NGSS.HS-PS4-3