Chapter 29 Stars

Consider the color of the sun. Based on this color, what is the sun's approximate surface temperature?

• 10,000-30,000

• 6000-7500

• 30000-60000

• <3500

Which statement best describes stars?

• large planets that are composed mostly of gases

• celestial bodies made of gas that give off light

• faint dots of light that can be seen from Earth's surface

• objects that form in the outer parts of the solar system

Felix examined several photos of stars. To compare their temperatures, he looked at the colors of the stars. He organized the photos in order from coolest to hottest. Which of these answers shows the correct order?

• red, yellow, white, blue

• white, blue, yellow, red

• yellow, white, blue, red

• blue, yellow, white, red

Which of the following statements best relates a star’s color to its surface temperature?

• blue stars have a relatively low temperature

• red stars have a relatively high temperature

• blue-white stars have a relatively low temperature

• yellow stars have a relatively low temperature

Based on evidence in the table, which star would appear the dimmest from Earth’s surface?

• Star A

• Star B

• Star C

• Star D

A scientist discovers a new star. It is blue-white and is about 20,000 K. Which star is it most similar to?

• Sun

• Rigel

• Vega

• Canopus

Absolute magnitude is defined as…

• mass of a star

• color of a star

• brightness of a star, as it appears from Earth

• brightness of a star independent from the distance of Earth

About 90 percent of the stars in the universe, including the sun, are main sequence stars. What do all main sequence stars have in common?

• All main sequence stars are yellow like our sun.

• All main sequence stars are as bright as our sun.

• They are all undergoing fusion of helium into carbon within their cores

• They are undergoing fusion of hydrogen into helium within their cores

Tags

NGSS.HS-ESS1-1

Which of the following correctly ranks astronomical objects by size, starting with the smallest?

• earth, sun, solar system, galaxy, universe

• sun, solar system, earth, universe, galaxy

• universe, galaxy, solar system, earth, sun

• solar system, earth, sun, universe, galaxy

Tags

NGSS.MS-ESS1-3

On an HR diagram, stars at the same temperature are found...

• aligned horizontally (next to each other)

• aligned vertically (one above the other)

• along the main sequence

• spread through the diagram