Stars (SC.8.E.5.5 & SC.8.E.5.6)

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

Tags

NGSS.MS-PS3-4

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

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

Which star should Ashley label as the hottest?

• Wolf (red)

• Ceti (yellow)

• Cygni B (orange)

• Vega (blue-white)

Which of the following pairs of terms directly relates to the actual brightness of a star?

• absolute magnitude and luminosity

• apparent magnitude and luminosity

• size and luminosity

• absolute magnitude and apparent magnitude

Which term best describes the movement of matter due to temperature differences in the sun?

• conduction

• convection

• nuclear fusion

• radiation

Tags

NGSS.MS-ESS2-4