Random
An astronomical unit is defined as the distance between
the earth and the sun
The sun is composed of mostly
Hydrogen
The moon has a nearly perfect spherical shape because
it rotates slowly
In what lunar phase must the moon be during a total solar eclipse?
New moon
Material blasted out of a crater
ejecta
We call the 365 named days from Jan 1 to Dec 31 a _____________ year
calendar
Severe storms that disrupt telecommunications on Earth are called
Solar Flares
Compared to the earth, the average density of the moon is
less (less dense)
Which effect is NOT produced by tidal forces between the earth and moon?
A. earth's spin slows
B. moons orbit is drawn closer to earth
C. moon orbits faster
B
Outer region of suns atmosphere
Corona
A depression on the surface of the moon
crater
Astronomers believe that sunsposts form when
Pairs of magnetic disturbances appear on the suns surface
The moons surface gravity compared to the earth is how much less?? (amount)
1/6th
We know the moons interior structure is similar to earths by collecting data on
moonquakes
Large dark area on surface of the moon
Mare
entire range of electromagnetic waves is called the solar
spectrum
The apparent path that the sun follows through the stars as seen from Earth's perspective is called
The ecliptic
The moon has a very think atmosphere because
It has too little mass
Seasons are cause by earth's motion around the sun and it's
tilt
Visible surface of the sun
photospphere
Hot plasma rises to the surface, cools and descends into the suns interior again in the suns _____________ zone
convective
The region in the sun where energy travels primarily as electromagnetic waves
radiative zone
once
Scientists believe the moon has a liquid _________ core and a solid ____________ core
outer, inner
Streams of plasma that rise up into and descend from the suns corona, often forming loops are called ________
prominences