6th Grade Science Test 7 Flashcards
the study of outer space and all that it contains
astronomy
dark patches on the sun’s photosphere
sunspots
part of the sun visible only during a solar eclipse
chromosphere or corona
a high-speed stream of particles that travels outward from holes in the sun’s corona and beats upon the earth’s upper atmosphere
solar wind
the three basic types of galaxy shapes
spiral
elliptical
irregular
stars that outline a picture in the sky
constellation
familiar shape within the constellation Ursa Major which contains the pointer stars
Big Dipper
the hottest region of the sun
core
streams of gas erupting from the chromosphere and returning in loop like fashion
solar prominence
spiral arms attached to a straight “bar” that runs through a galaxy
barred spirals
the force that resists motion
friction
an area that contains no air
vacuum
large clouds of gas and dust floating around in space
nebulae
the brightest star in the night sky
Sirius
the pole star is known as
Polaris