SC 4 E 5 2

Which stars in the diagram are the coolest?

• white dwarfs

• super giants

• the stars in the upper left corner on the main sequence

• there is no way to know from the diagram

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 statement best describes stars?

• Large planets that are composed mostly of gases

• Celestial bodies made up 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

Which one of these claims can be made based on evidence in the graph?

• Red super giants have higher temperatures than main sequence stars.

• Blue giants have higher temperatures than white dwarfs.

• Blue giants have higher temperatures than red super giants.

• Main sequence stars have higher temperatures than white dwarfs.

Tags

NGSS.HS-ESS1-3

Scientists have determined that the sun will continue to consume hydrogen in its core for another five billion years or so. After the hydrogen is consumed, what will be its primary fuel?

• Helium

• Magnetism

• Nitrogen

• Oxygen

Tags

NGSS.HS-ESS1-1

What are the layers of the sun's atmosphere?

• Core, chromosphere, corona

• Photosphere, radiative zone, corona

• Radiative zone, chromosphere, core

• Photosphere, chromosphere, corona

Two stars have the same apparent magnitude as seen from Earth’s surface. Star A is 33 light-years away. Star B is 346 light-years away. Which of the following claims is supported by the evidence?

• Star B is larger than star A

• Star B is more luminous than star A

• The stars have the same absolute magnitude

• Star A has a smaller absolute magnitude

The sun produces large amounts of energy. By what process does the sun produce energy?

• radiation

• convection

• nuclear fusion

• electromagnetic radiation

Tags

NGSS.HS-ESS1-1

The sun is much larger than the moon. However, as viewed from Earth, the sun and moon appear to be the same size. Which reasoning explains why the sun and moon appear to be the same size when viewed from Earth?

• The moon is much hotter than the sun

• The moon is much denser than the sun

• The moon is much brighter than the sun

• The moon is much closer to Earth than the sun

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-3

An astronomer observes that the color of a star is similar to the color of the sun. Therefore, she infers that the star and the sun have similar sizes and surface temperatures. Using this information, what can the astronomer conclude about the star?

• The star s a white dwarf

• The star is medium sized

• The star is hotter than most other stars in our galaxy

• The star is brighter than most other stars in our galaxy