EMS
Why does the sun appear yellow?
Because the peak wavelength of the sun's energy appears yellow on the spectrum.
What happens during the process of convection?
Hot gas moves away from the sun's core.
When did the explosion that started the big bang theory happen?
13-15 billion years ago.
What is a galaxy?
A collection of millions and billions of stars.
The innermost layer of the sun.
Core
T or F
A star's temperature has nothing to do with it's color.
False. A Star's temperature determines the color of the star.
What factors influence the brightness of a star?
Its temperature, size, and distance from Earth.
What evidence do we have to support the big bang theory?
Cosmic background radiation is still happening today and it started when the big bang theory.
What holds galaxies together?
Gravity. Without gravity, everything in space would fall apart and be a veil of gas spread throughout space.
What layer is the hottest part of the sun?
the core
What are the different types of light
Ultraviolet, visible, infrared
What color of star is the hottest?
Blue
T or F
The big bang theory is constantly being tested
True
What type of galaxy is the Milky Way?
A spiral galaxy. Many astronomers think that there is a huge black hole in the center of the galaxy.
The outermost layer of a star
Corona
How does the spectrum of a star tell us what the star is made up of?
The spectra of most stars contain dark lines. The dark lines are caused by the gasses that the star is made up of.
What type of star will the sun become?
A red giant and then a white dwarf.
Did the universe start with a big bang?
Before the explosion, there was no time and no space. But out of the nothingness came the vast system of time and space that now makes up the universe. The explosion released all of the matter and energy that still exist in the universe today.
True or false...
Elliptical galaxies have spiral arms.
FALSE.
Elliptical galaxies have no spiral arms and are spherical or egg-shaped.
What is the coolest layer of the sun?
the photoshere
Why do scientists put telescopes in space?
Telescopes in space can study a wider range of the EMS than telescopes on the ground can.
What is the last stage of a star before it dies?
A red giant.
Why do scientists feel that the big bang is the best theory to explain the origin of the universe?
The big bang theory is the one that is best supported by the current evidence including cosmic background radiation and observations of the movement of distant galaxies.
What is a quasar?
They are the most distant and radiant objects in space. They may be infant galaxies but they have a starlike appearance.
List the order of the layers of the sun.
core, radiative zone, convective zone, photosphere, chromosphere, corona