Vocabulary
What is an axis?
Imaginary line running through the center of Earth connecting the South and North Poles
What is the umbra?
Darkest portion of shadow
What causes seasons?
The 23.5 degree tilt of the Earths axis and its revolution around the Sun.
What does waxing mean?
growing
What is the major line of longitude?
Prime Meridian
What is rotation? What does it cause?
an object spinning on its axis. Day and night
What is a solar eclipse?
When the Moon casts a shadow on the Earth because the Sun, Earth and Moon orbits align. The Moon is between the Sun and the Earth
During which month does the Northern Hemisphere experience the most sunlight?
Which side of the moon is lit during the waxing phase?
How much of the moon is lit at a time from space?
Half
What is revolution? Give an example
An object orbiting around another object. Example varies
What is a lunar eclipse?
When the Earth casts a shadow on the moon because the Sun, Earth and Moon orbits align. Earth is between the Sun and Moon
When is night longer than day in the Arctic Circle?
After the fall equinox until the spring equinox. Late September to late March.
What does gibbous mean and when does it occur?
Any Bulging, Hump, Convex, Protruding
Right before and after a full moon
Approximately how often does the tide change?
Two high and Two low in a day
Each one about every six hours
What is penumbra?
the lighter, outer part of a shadow where the light source is only partially blocked
What is an annular solar eclipse?
happens when the Moon passes in front of the Sun but is too far from Earth in its elliptical orbit to completely cover it, leaving a bright, fiery ring of sunlight visible around the Moon's silhouette
What is December 21st (or 22nd)?
Why do we see lunar phases?
The moon reflects sunlight and it orbits the Earth changing the angle between the Earth, Sun and Moon.
What causes tides? Give an example
The moon gravity on the Earth and the Earths rotation.
Ms. Stocking judges example
What is tidal locking?
is the phenomenon by which a body has the same rotational period as its orbital period around an object
Why does the moon appear red sometimes?
Earths atmosphere scatters blue light allowing red to reflect of the moon. This usually happens during a total lunar eclipse but can occur because of pollution in the atmosphere
During what dates do the Northern and Southern Hemispheres experience about equal light? (You may be off by 1-2 days) Why does this happen?
March 20-21
September 22-23
Neither hemisphere is tilted directly at the Sun. Tilt is sideways relative to the Sun.
How much and which side of the moon is illuminated during third quarter?
50% and left side
What are the 5 major lines of latitude?
What is artic circle, tropic of Cancer, equator, tropic of Capricorn and Antarctic circle.