Star Life Cycle Review

• Transports energy from the radiative zone to the surface of the sun.

• Sunspot• Corona• Photosphere• Convective zone

• Convective zone

• The only layer of the sun that reflects visible light.

• Sunspot • Corona• Photosphere• Solar flare

• photosphere

• Outermost layer of the sun that is hotter than the surface of the sun and seen only during a solar eclipse.

• Sunspot• Corona• Solar flare• Convective zone

• Corona

• Cooler areas located near the equator on the surface of the sun

• Sunspot• Photosphere• Chromosphere• Solar flare

• sunspot

• Violent explosions of gas released from the chromsphere and corona.

• Sunspot• Photosphere• Chromosphere• Solar flare

• Solar flare

• The spherical distance surrounding a black hole out of which nothing can escape

• Accretion disk• Singularity• Event horizon• Escape velocity

• Event horizon

• A spiral of gas that can surround a black hole.

• Accretion disk• Singularity• Event horizon• Escape velocity

• Accretion disk

• The speed at which an object must travel to escape the gravitational pull of anther object.

• Accretion disk• Singularity• Event horizon• Escape velocity

• Escape velocity

• The point at the center of a black hole

• Accretion disk• Singularity• Event horizon• Escape velocity

• singularity

• ____________ are caused by solar winds interacting with the Earth’s magnetosphere at the poles.

• Auroras• Northern lights• Southern lights• All of the above• None of the above

• All of the above

• The sun generates huge amount of energy through nuclear ________.

• Fission• Fusion

• fusion

• In the sun’s core __________ collide with other ___________ to produce helium atoms.

• Protons• Electrons• Neutrons

• protons

• Suppose a star that is 500 light years away from Earth exploded 500 years ago. When will see the explosion?

• 500 years ago• 500 years from now• today

• today

• Of the following stars, the youngest are

• Main sequence stars• White dwarfs• Black dwarfs• Red giants

• Main sequence stars

• White dwarfs stars

• Form from red giants• Fuse hydrogen to carbon• Form from planetary nebulas• Form supernovas

• Form from planetary nebulas

• Nearly 90% of all stars are in what point of their life cycle?

• Nebulas• Protostars• Main sequence stars• White dwarfs

• Main sequence stars

• The sun is

• An unusually hot star• A very cool star• A typical star• None of the above

• A typical star

• The surface temperature of a star can be estimated based on the star’s

• Size• Color• Age• Mass

• color

• All stars

• Reflect light from the sun• Appear to wander off their star paths• Produce their own light• All of the above• None of the above

• Produce their own light

• The solar wind pushes and shapes the Earth’s ____________.

• Magnetic Poles• Magnetosphere• Atmosphere• Weather patterns

• Magnetosphere

• The corona is hotter than the ___________ of the sun.

• Core• Radiative zone• Convective zone• Photosphere (surface)

• Photosphere (surface)

• The sun is a medium sized star but looks very bright to us because it is

• Very luminous• Very hot• Father away from us than other stars.• Closest to us

• Closest to us

• A red star is hotter than

• a blue star• A white star• All other stars• No other stars

• No other stars

• Most of the stars in the Milky Way will end their lives as

• Blackholes• Neutron stars• Black dwarfs• Main sequence stars

• Black dwarfs

• A star is born when

• Gas and dust collapse inward• Nuclear fusion starts in the core• Fusion of the hydrogen slows down• The core becomes carbon and oxygen

• Nuclear fusion starts in the core

• Cooler stars glow with light that is less intense at

• Shorter wavelengths (toward the red end of the spectrum)• Shorter wavelengths (toward the blue end of the spectrum)• Longer wavelengths (toward the red end of the spectrum)• Longer wavelengths (toward the blue end of the spectrum)

• Longer wavelengths (toward the red end of the spectrum)

• Stars radiate (give off)

• Heat• Electromagnetic waves• Light• All of the above• None of the above

• All of the above

• Galaxies contain interstellar matter. What is interstellar matter?

• Gas and dust that may form new galaxies.• Gas and dust that may form new stars• Matter that may form new universes• Matter that may form new constellations

• Gas and dust that may form new stars