Star Life Cycle Review

Transports energy from the radiative zone to the surface of the sun. Sunspot Corona Photosphere 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

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

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

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)

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

A red star is hotter than a blue star A white star All 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