Ch 4 L2 Stars Vocabulary

Fill in the blank: A ______ is a large ball of gas held together by gravity with a core so hot that nuclear fusion occurs.

• star

• planet

• comet

• asteroid

Fill in the blank: The ______ is a shell of cooler hydrogen above a star's core.

• radiative zone

• convective zone

• photosphere

• corona

Fill in the blank: The ______ is where hot gas moves up toward the surface and cooler gas moves deeper into the interior.

• convection zone

• radiation zone

• photosphere

• core

Fill in the blank: The ______ is the apparent surface of a star.

• photosphere

• corona

• core

• chromosphere

Fill in the blank: The ______ is the orange-red layer above the photosphere.

• chromosphere

• photosphere

• corona

• radiative zone

Fill in the blank: The ______ is the wide, outermost layer of a star's atmosphere.

• corona

• photosphere

• chromosphere

• core

Fill in the blank: A ______ is a dark area of gas on the sun's surface that is cooler than surrounding gases.

• sunspot

• solar flare

• corona

• prominence

Fill in the blank: A ______ is a huge, reddish loop of gas that protrudes from the sun's surface, linking parts of sunspot regions.

• prominence

• solar flare

• corona

• sunspot

Fill in the blank: A ______ is a sudden eruption of intense high-energy radiation from the sun's surface.

• solar flare

• solar wind

• sunspot

• coronal mass ejection

The ______ is a graph that plots luminosity v. temperature of stars.

• Hertzsprung-Russell diagram

• Pie chart

• Bar graph

• Line graph