Chapter 22 - The Sun, Moon, And Earth System Flashcards
What is the sun mostly composed of
Hydrogen
The distance between the earth and sun
Astronomical unit
What state is the sun in?
Plasma
What is solar wind made of
Protons and electrons
Which temperatures are higher: photosphere or corona?
Corona
Where do thermo nuclear reactions occur?
The sun’s core
What are severe solar storms called?
Solar flares
Which density is greater: moon or Earth?
Earth
What is the moon’s gravity compared to the Earth’s?
The moon’s gravity is one-sixth of the earth’s
Why doesn’t the moon have a large atmosphere?
It doesn’t have much mass
Which theory says that the earth and moon both formed from the same cloud?
Accretion
The apparent path that the sun goes through
Ecliptic
The average distance from the center of the moon to the center of the earth
More than 340,000
Is the moon waxing or waning in the beginning of the cycle?
Waxing
What phase must the moon be for a lunar eclipse to occur?
Full moon
Where does the convective current take place?
Convective zone
What is the plasma called that leaves the sun and loops back around?
Solar prominences
What do scientists use to block out the sun to see the corona?
Coronagraph
What evidence do we have that the sun is spinning on its axis?
Sunspots
What is the most spectacular crater on the moon?
Tycho
Which way do cusps face?
Away from the sun
What is the nickname for the moon in mid to late September?
Harvest moon
Where is the moon in a solar eclipse?
In between the earth and the sun
What is the outer layer of the sun’s atmosphere?
Corona
