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 White dwarfs Main sequence stars
White dwarfs
A star is born when Gas and dust collapse inward Nuclear fusion stars in the core Fusion of the hydrogen slows down The core becomes carbon and oxygen
Nuclear fusion stars 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