How can we help?

You can also find more resources in our Help Center.

25 terms

Earth Science Astronomy Chapter 1 Earth, Moon,& Sun

STUDY
PLAY
astronomy
the study of the moon, stars and other objects in space.
axis
the center around which something rotates
rotation
the spinning of the Earth on its axis
revolution
the movement of one object around another.
orbit
the path of an object as it revolves around another object in space
calendar
a system of organizing time that defines the beginning, length, and divisions of a year.
solstice
when the sun is farthest north or south of the equator
equinox
period of equal days and nights; the beginning of spring and autumn; Ex. vernal/autumnal equinox
force
a push or pull
gravity
the force that attracts all objects toward each other
law of universal gravitation
every object ibn the universe attracts every other object
mass
the amount of matter in an object
weight
the force of gravity on an object
inertia
the tendency of an object to resist a change in motion
Newton's first law of motion
the scientific law that states that an object at rest will stay at rest and an object in motion will stay in motion with a constant speed and direction unless acted on by a force
phases
the different shapes of the moon you see from Earth
eclipse
When an objet in space moves between the sun and a third object, it casts a shadow on the third object.
umbra
darkest part of the moon's shadow
penumbra
partial shadow (in an eclipse)
tide
the rise and fall of the ocean water that occurs every 12.5 hours or so.
spring tide
a tide with the greatest difference between low and high tides
neap tide
the tide with the least difference between consecutive low and high tides
craters
large round pits in the moon's surface
meterods
chunks of rock or dust from space
maria
dark, flat regions on the moon's surface also > the Latin word for "seas"