Midterm Flashcards
(26 cards)
isotopes have a different number of…
neutrons
what do covalent bonds form between?
nonmetals and nonmetals
what do ionic bonds form between?
metals and nonmetals
what is the order of the waves? longest to smallest
radio micro Infared visible ultraviolet x-Ray gamma
how does light react?
wave and particle
in ROYGBIV which end has the shortest wavelength? How does this relate to the energy level?
gamma side the energy is higher
what is the speed of light?
3x10^8 m/s
what happens to the wavelength if the frequency is increased over the same amount of time?
the wavelength gets shorter
where does a star recieve it’s energy?
nuclear fusion of H into He
what happens to the relative amounts of H and He in a star as it ages?
H decreases and He increases
how are stars classified?
temperature, brightness
what forces are balanced in a stable star?
nuclear fusion and gravity
which stage do all stars enter at some point in time in their life cycle?
main sequence. spend 90% of their life there
what is the sequence for a massive star? what are the two possibilities it has for its ending?
nebula, protostar, main sequence, red giant, super nova, either neutron star or black hole
what is the sequence for a medium sized star?
nebula, protostar, main sequence, red giant, planetary nebula, white dwarf
what kind of star remains in the main sequence the longest?
low mass stars
what is the perihelion?
when earth is the closest
what is aphelion?
when earth is farthest away
when is summer?
aphelion
what is the order for a solar eclipse
sun moon earth
what is the order for a lunar eclipse?
sun earth moon
inverse square law: what is the answer to 1/5^2
1/25
what is an ion?
an atom with a different number of electrons
during a solar eclipse what is the phase of the moon?
new moon
