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
the closest star to the earth
the sun
the brightest star in the constellation Leo
Regulus
the brightest star in the installation Perseus
Algol
the imaginary line that stretches from pole to pole
axis of rotation
a star system containing millions to billions of stars
galaxy
the cluster with about 40 galaxies in which we find Earth
Local Group
distance of the sun from the earth
93 million miles
the part of the sun’s atmosphere closest to its surface
chromosphere
the hottest region of the sun’s atmosphere
corona
a pair of stars that travel together and rotate around each other as the moon does the earth
binary star
the actual explosion of a star
supernova
Be able to identify the following constellations.
Southern cross Andromeda Cassiopeia Cygnus Draco
Describe what space is like. Include at least 3 things that make space different from Earth and its atmosphere
You will need to make complete sentences.
no air (a vacuum) no air friction mostly black unusual activities (weightlessness) extremes of temperature
What is the difference between apparent magnitude and absolute magnitude?
Apparent magnitude is the measurement used to describe the brightness of a star as it appears from Earth. The actual brightness of a star is called its absolute magnitude.
