Universe Test Corrections

A Hertzsprung-Russell diagram is shown. A star that has a luminosity of 10^-2 and a temperature of 20,000K is most likely a...

• Main Sequence

• White dwarf

• Blue Giant

• Red Giant

Tags

NGSS.HS-ESS1-3

Which statement best explains why the sun appears brighter to people on Earth than any other star?

• Sunlight reaches Earth’s atmosphere at an angle that causes the sun’s light rays to intensify.

• Unique chemical reactions in the sun’s core produce a high-energy wavelength of light.

• The sun burns at a higher temperature than any other star.

• The sun is closer to Earth than any other star.

Alpha Centauri appears as a bright object visible in the Milky Way galaxy. Alpha Centauri is actually a system of three objects. Each object produces light, is made out of hydrogen and helium and rotates on its own axis. The system is an average of 4 light-years from Earth. Based on this information, the three objects that make up the Alpha Centauri system are all —

• Asteroids

• Comets

• Planets

• Stars

The Hertzsprung-Russell diagram shown is divided into four sections. Which section of the diagram includes the coolest, brightest stars?

• Section 1

• Section 2

• Section 3

• Section 4

Tags

NGSS.HS-ESS1-3

The temperature of a star determines the wavelength of visible light that is produced. The visible part of the electromagnetic spectrum is shown. Stars with the highest temperatures will emit most of their light at wavelengths that are near —

• Red light

• Orange light

• Green light

• Blue light

Tags

NGSS.HS-PS4-1

The spectral classes of four stars are shown in comparison with a Hertzsprung-Russell diagram. Based on the information, which star is MOST like the sun?

• Star 1

• Star 2

• Star 3

• Star 4

A diagram of the electromagnetic spectrum is shown. Earth’s atmosphere blocks short wavelengths of the electromagnetic spectrum. Which telescopes must be placed in orbit around Earth in order to observe short-wavelength radiation?

• Gamma Ray telescopes

• Visible - light telescopes

• Infrared telescopes

• Radio telescopes

Tags

NGSS.HS-PS4-3

Which statement best describes a galaxy?

• cloud of gas that is the birthplace of stars

• A system of billions of stars, gas, and dust held together by gravity

• A ball of plasma that experiences nuclear fusion in its core

• A mass of dust and ice that orbits a star in an elliptical pattern

Which statement about stars is correct?

• Star formation begins in a nebula.

• White dwarfs become main-sequence stars when they gain mass.

• Supergiants are stars that can absorb black holes.

• Main-sequence stars are formed by comets.

Tags

NGSS.HS-ESS1-3

The table lists the distances of some of the nearest stars. Based on the table, a student used a measuring tape to model the distances between the sun and these nearby stars. The sun was at the starting point. Proxima Centauri was at the 10 m mark. Which star was closest to the 20 m mark in this model?

• Barnard's Star

• Wolf 359

• Sirius A

• Ross 248