Questions
Which layer of you see in photographs of the Sun?
Photosphere
the doppler effect is used to determine
whether a galaxy is moving toward or away form Earth
how do astronomers tell whether a black hole exists in the center of a galaxy
they can observe how the gravity of the black hole affects mater pulled into it
invisible object left behind after a supernova
black hole
describe the similarities and differences between higher-mass stars and lower-mass stars
Both type spend most of their lives in the main sequence, expand and then die. Higher mass stars develop more quickly and leave behind neutron stars or black holes, while lower mass stars become white swarfs
Sunspots are cooler than surrounding areas?
True
what is the big bang
the beginning of the universe's expansion
the transfer of energy by the motion of heated gas or liquid is
convection
change in a wavelength of a wave due to movement
doppler effect
Why might solar wind have a stronger effect on inner planets than outer planets
the solar wind would be dispersed more by the time it reaches the outer planets
Name the unit used to describe the distance of stars?
Light-years
why cant we see the sun's corona under normal conditions
brighter light of the photosphere blocks it
sun's outer most layer
corona
moment when universe started to expand
big bang
planets shine be reflecting light. Why do some planets in our solar system appear brighter than stars, even tho stars give off their own light
the planets are much closer to us
how do lower mass stars differ from higher mass stars
they develop more slowly
how do astronomers use parallax to calculate a stars distance
using the apparent shift in the star's position when plotted from opposites sides of Earth's orbit
stream of electrically charged particles
solar wind
why is looking at a star in the night sky like seeing back in time
stars are so far away from Earth that the light they give off takes years to travel to Earth. When you look at a star, your eyes are gathering light the star gave off years ago
spot on a photosphere
sunspot
what is the shape of the milky way
spiral
where do heavy elements, such as iron come from?
they come from the fusion of elements in the core of stars after the stars leave their main sequence
clouds of gas and dust
nebula
the core of a particular star consists of almost entirely helium what will soon happen to this star
leave the main sequence and begin fusing helium
what example would you use to explain the relationship between color and temperature