Unit 7 Review

Based on this diagram, which type of stars would belong to spectral class M and have

the highest luminosity?

Tags

NGSS.HS-ESS1-3

A star that has a luminosity of 10-2 and a temperature of 20,000 K 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.

Which student described these two celestial bodies correctly?

• Student 1

• Student 2

• Student 3

• Student 4

Tags

NGSS.HS-ESS1-3

With the use of the Hubble Space Telescope, scientists recently discovered a giant

runaway star. It is 90 times larger than the Sun and is very hot and blue-white in

color. Why does the Sun appear to be brighter than this runaway star when viewed

from Earth?

• The Sun is closer to Earth than the runaway star.

• The Sun is a different color than the runaway star.

• The Sun is made of different elements than the runaway star.

• The Sun is a different color than the runaway star.

A star that is several thousand times brighter than the Sun with a temperature lower

than 4,000 K would be classified as —

Select TWO correct answers.

Tags

NGSS.HS-ESS1-3

Two start are identified on the Hertzsprung-Russell diagram below. Based on this diagram Star 1 is ​ ​ ​ (a)   and ​ (b)   than Star 2

• hotter
• cooler
• brighter
• less bright

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 —

Tags

NGSS.HS-PS4-1

Which section of the diagram includes the coolest, brightest stars?

• Section 1

• Section 2

• Section 3

• Section 4

Tags

NGSS.HS-ESS1-3

The illustration provided shows four locations in or near the Milky Way galaxy. Which of the labeled locations shows the approximate position of the Sun?

• W

• X

• Y

• None of these

Tags

NGSS.MS-ESS1-2