Download Week 22: Earth, Moon, and Sun

Week 22: Earth, Moon, and Sun
Atmosphere
the air that surrounds the earth
Corona
the outermost layer of the sun
Craters
a bowl-shaped structure at the top of a
volcano or on a planet or moon
Equinox
a day when the hours of darkness and
light are about equal, either the first
day of spring or the first day of fall
Planet
large objects that orbit the sun
Satellite
an object that orbits a planet
Solar prominence
a sudden burst of energy from the
photosphere that can reach an altitude
of thousands of kilometers and takes
the shape of a loop or ribbon
Solar flare
a sudden burst of energy from the
photosphere
Solar system
the sun and all the objects that move
around it
Week 22: Earth, Moon, and Sun
Solstice
a day with the most hours of daylight
or darkness, either the first day of
summer or first day of winter
Star
an object in space that produces its
own heat and light
Sun
the star that is the central body of the
solar system, around which the planets
revolve and from which they receive
light and heat
Sunspots
irregular dark spots that appear on the
surface of the sun that are cooler than
the surrounding photosphere