Unit F- List A Flashcards
Data
Information gathered.
Phenomenon
An event related to how the world and universe work.
Model
Any representation of a system, or its components, to help one study and understand how it works.
Axis
The imaginary line around which an object spins, or rotates. Earth rotates around an axis that runs straight through Earth from the North Pole to the South Pole.
Crescent Moon
The phase of the Moon in which the lit portion of the Moon is visible from Earth’s surface is less than a half-circle (crescent shape). Crescent moons occur right after and right before the new Moon.
Equator
An imaginary circle that divides Earth into two halves called the Northern Hemisphere and Southern Hemisphere.
First-Quarter Moon
The phase of the Moon, occurring about seven days after the new Moon, in which the lighted portion of the Moon that is visible from Earth’s surface is a half-circle.
Full Moon
The phase of the Moon that occurs about 14 days after the new Moon in which the complete lighted portion of the Moon is visible from Earth’s surface & appears as a full circle.
Gibbous Moon
A phase of the Moon before or after it is full, when more than half of its disk is illuminated.
Last-Quarter Moon
The phase of the Moon that occurs about 7 days after the full Moon in which the lighted portion of the Moon that is visible from Earth’s surface is a half-circle.
Lunar Cycle
The revolution of the Moon around Earth that produces the changing phases of the Moon. One complete lunar cycle takes about 29.5 days.
New Moon
the phase of the Moon, occurring about 14 days after the full Moon, in which none of the lighted portion of the Moon is visible from Earth’s surface.
Orbit
another term for revolution.
Plausible
consistent with evidence.
Revolution
a complete circle made by a planet around a sun or by a moon around a planet (orbit).
Revolve
to travel around another object in a circular or elliptical path.
Rotate/Rotation
to turn or spin around an axis.
Waning
the phases of the Moon when the illuminated portion visible from Earth is decreasing (between the full and new Moon).
Waxing
the phases of the Moon when the illuminated portion visible from Earth is increasing (between the new full Moon).
Time Zone
a region throughout which the same standard time is used. (There are 24 time zones in the world at approximately by meridians at 15 intervals, an hour
apart.)
Hemisphere
One half of a sphere. (The half of Earth that is north of the equator is the Northern Hemisphere; the half of Earth that is south of the equator is the Southern Hemisphere.)
