The EMS
what is the main use of radio waves
mobile radio communication
Describe the life cycle of a low mass star
Nebula → nuclear fusion occurs in a
star → star runs out of hydrogen → heavier elements continue to fuse
→ star cools and expands → becomes a red giant → collapses into a white dwarf
what is the "fire" substance around the sun
the corona
what is a galaxy
A galaxy is an enormous collection of a few million to trillions of stars, gas, and dust held together by gravity. Galaxies can be several thousand to hundreds of thousands of light-years across.
Radiation left over from the Big Bang
What is Cosmic Background radiation
what are 5 of the 7 types of electromagnetic radiation
when stars run out of hydrogen, what happens
iron forms and fusion stops
what zone is inbetween the photosphere and the radiation zone
the convection zone
do all interacting galaxies merge
no only some merge into a single form
what formed our solar system
a solar nebula
what type has the longest wavelength
radio waves
on the diagram what stars are dimmest
red stars
what zone is the farthest away from the core
the photosphere
what is the name of our galaxy
the milky way
when was our solar system formed
13.7 billion years ago
Define electromagnetic spectrum
Electromagnetic spectrum is the range of all the frequencies or wavelengths of electromagnetic radiation.
what color stars are the brightest on the diagram
blue stars
what is the center of the sun called
the core
how many stars are in the milky way
1, the sun
what does not give off electromagnetic radiation
dark matter
what type has the shortest wavelength
gamma rays
which elements are most common in a young star
hydrogen and helium
What zone is closest to the core
the radiation zone
what is the closest galaxy to us
the Andromeda galaxy
dark energy