movements of water caused by the gradational attraction of the moon and sun
100
What is umbra?
cone of total darkness
100
What is a maria?
seas on the moon
100
why does the earth have seasons?
Because of the rotation of the earth and the tilt
200
At which phase can we see all of the lighted half of the moon?
full moon
200
What are high tides?
The moon's pull is strongest when the Earth is directly facing the moon
200
What is penumbra?
cone of partial darkness
200
What is Impact?
large body collided w/ Earth 4.6 billion years ago
200
What angle is the Earth tilted?
23.5 degrees
300
At which phases can we see less than one half of the lighted part of the moon?
waxing crescent and waning crescent
300
What are spring tides?
tides with maximum daily tidal range that occur every 14 days
300
Why don't we see eclipses every month?
the moon is tilted by 5 degrees
300
What is ejection?
debris left over from impact, began to revolve around Earth. debris consisted of mantle material from Earth and iron core of large body
300
What is insolation?
solar radiation
400
Where does the moon get its light?
Light reflected from the sun
400
What are low tides?
when high tides form, water is drawn away from area between high tides
400
What is an eclipse?
shadow of celestial body falls on another
400
What is formation?
debris joined together to form the moon. Moon's surface has several craters because as it cooled, debris continued to collide w/ it.
400
What is the angle of insolation?
angle that sunlight hits Earth
500
What is synchronous motion?
the moon's rate of rotation is equal to its revolution around the Earth
500
What are neap tides?
occurs when sun, moon, Earth are in 90 degree angle. Smallest of high tides. Occurs during 1st and 3rd quarter moon phases. Occurs halfway between spring tides. Every 14 days.
500
In what phases do the solar and eclipses occur?
solar- new moon
lunar- full moon
500
Does the moon have an atmosphere?
No
500
How many hours of sunlight does the Equator always have?