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Astronomy Practice exam

STUDY
PLAY
sunspots
the most conspicuous features on the surface of the sun are dark blemishes called:
photosphere
the layer of the sun which radiates most of the light that reaches the earth
helium
The sun's energy results form the conversion of hydrogen into:
The length of daylight on the moon is
2 weeks
nuclear fusion
source of the sun's energy
maria
when viewed from the earth the dark-appearing areas on the moon are called:
lunar highlands
oldest lunar feature
solar wind
streams of atomic nuclei, protons, and electrons emitted from the sun
what are the rings of saturn composed of?
small/individual particles or moonlets
nebular hypothesis
the formation of the solar system from a huge cloud of dust and gasses
Venus
the high temperatures of this planet are associated with the greenhouse affect
neutron star
stars that are composed of matter in which electrons have been squeezed into the nucleus of the atom
black hole
a star in which light cannot escape because of the immense gravitational pull at its surface and the final stage of massive stars
main sequence
most stars are in this stage of evolution
surface temperature
determines color
what type of galaxy is the milky way?
spiral